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Chemical Stability and Compatibility

Answers Question Updated
1 What does hydrolysis mean? 11/02/2017 - 11:27 Tyler Petty
1 Acid matrices for stabilizing Hg 11/01/2017 - 15:43
1 Stability studies for different types of plastic 11/01/2017 - 15:28
1 Storage temperatures for standards 11/01/2017 - 12:05
1 Stability assessments and expiration dates 11/01/2017 - 11:37
1 Mercury (Hg) stability in glass and HNO3 11/01/2017 - 10:57
1 Compatibility of metal mixture (Bi, Te, Se, and Sb) 11/01/2017 - 10:51
1 Metal stability in trace acid 11/01/2017 - 10:49
1 Stability of diluted iodide standards 11/01/2017 - 09:46
1 Mulit-element instability at 10 ppm 11/01/2017 - 09:16
1 Mercury (Hg) stability in plastic containers 11/01/2017 - 09:09
1 Stability of multi-element ppb standards 11/01/2017 - 09:05
1 Mercury (Hg) starting material and complexing Sb (antimony) 11/01/2017 - 08:50
1 Stability of As(+3) and As(+5) 11/01/2017 - 08:20
1 Yttrium (Y) internal standard stability 11/01/2017 - 07:48
1 Interactive Periodic Table stability data 11/01/2017 - 07:44
1 Heavy metal impurity testing in HNO3 10/31/2017 - 12:21
1 Storage bottles for standards 10/31/2017 - 12:17
1 Mixing chlorate and perchlorate 10/31/2017 - 10:35
1 Stability of Ta and Nb upon dilution 09/20/2017 - 13:26 Anonymous
1 Creating multi-element standards 09/20/2017 - 13:24 Anonymous
1 Mercury (Hg) stability at 1000 ppm 09/20/2017 - 13:05 Anonymous
1 Mercury (Hg) stability in dried samples 09/20/2017 - 10:41 Anonymous
1 Tin (Sn) products in different acid matrices 11/11/2016 - 09:46 Anonymous
1 Mercury containers, stability, and contamination from glass 11/11/2016 - 09:37 Anonymous
1 Aqua regia stability 11/11/2016 - 07:33 Anonymous
1 Mixing stock products CMS-4 and CMS-5 11/10/2016 - 12:56 Anonymous
1 Mercury (Hg) preservation at low (<100 ppm) concentrations 11/10/2016 - 10:24 Anonymous
1 Choosing best matrix for diluted standards 11/10/2016 - 09:43 Anonymous
1 Gold (Au) and tantalum (W) ppb standards 11/10/2016 - 08:48 Anonymous
1 Mercury (Hg) calibration standard stability 11/09/2016 - 15:13 Anonymous
1 Matrix and dilution for Cd, Te in dilute sulfuric acid (H2SO4) 11/09/2016 - 14:27 Anonymous
1 Transpiration in polycarbonate vs. polypropylene sample tubes 11/09/2016 - 14:14 Anonymous
1 Tungsten (W) ICP-OES working standard stability 11/09/2016 - 14:06 Anonymous
1 Mixing metal standards and the correct matrix choice 11/04/2016 - 10:48 Anonymous
1 Stabilizing Si with HF and acid digestions 11/04/2016 - 10:07 Anonymous
1 Iodate (IO3) solution in potassium iodide (KI) 11/04/2016 - 08:08 Anonymous
1 Hypochlorous acid standard 11/01/2016 - 11:27 Anonymous
1 Element compatibility in multi-element standards 05/21/2016 - 12:10 Anonymous
1 Stabilizing nitrite (NO2) with ammonium hydroxide (NH4OH) 05/21/2016 - 12:10 Anonymous
1 Cold storage of ion-chromatography standards 05/21/2016 - 12:10 Anonymous
1 Precious metals analysis in potassium iodide (KI) matrix 05/21/2016 - 12:10 Anonymous
1 Amount of HF in stock standards 05/21/2016 - 12:10 Anonymous
1 Mixture of HCl, H3PO4, and oxalic acid 05/21/2016 - 12:10 Anonymous
1 Starting materials for Kjeldahl nitrogen, COD, and suspended solids 05/21/2016 - 12:10 Anonymous
1 Stability of multi-element standards 05/21/2016 - 12:10 Anonymous
1 Lower limit of mercury (Hg) standards 05/21/2016 - 12:10 Anonymous
1 Silver (Ag) stability in multi-element standards with chloride 05/21/2016 - 12:10 Anonymous
1 Calcium (Ca) stability in 0.1% HNO3 05/21/2016 - 12:10 Anonymous
1 Tin (Sn) concerns with alkaline, rare earth analyses 05/21/2016 - 12:10 Anonymous
1 How to group elements together to ensure stability 05/21/2016 - 12:10 Anonymous
1 Os analysis for USP<233> 05/21/2016 - 12:10 Anonymous
1 Element ratios between standards and samples for soils and seeds 05/21/2016 - 12:10 Anonymous
1 Problem with Au stability in ICP-MS measurements 05/21/2016 - 12:10 Anonymous
1 Antimony (Sb) stability as the tartrate complex 05/21/2016 - 12:10 Anonymous
1 Molybdenum and titanium stability; mercury volatility 05/21/2016 - 12:10 Anonymous
1 Different acid concentrations for CRMs 05/21/2016 - 12:10 Anonymous
1 Stability of organometallic standards 05/21/2016 - 12:10 Anonymous
1 Stability and changes in certified values with time 05/21/2016 - 12:10 Anonymous
1 Chemical stability of standards 05/21/2016 - 12:10 Anonymous
1 Titanium (Ti) and zinc (Zn) absorption on container materials 05/21/2016 - 12:10 Anonymous
1 Osmium (Os) and nitric acid 05/21/2016 - 12:10 Anonymous
1 Expiration of secondary 'daughter' standards 05/21/2016 - 12:10 Anonymous
1 Mixing stock multi-element standards 05/21/2016 - 12:10 Anonymous
1 Stabilizing tungsten carbide samples 05/21/2016 - 12:10 Anonymous
1 Concerns about OsO4 formation in multi-element standards 05/21/2016 - 12:10 Anonymous
1 Stability of diluted standards 05/21/2016 - 12:10 Anonymous
1 Iron (Fe) in camphor-10-sulfonic acid 05/21/2016 - 12:10 Anonymous
1 Recertification and international standards or practices 05/21/2016 - 12:10 Anonymous
1 Storage conditions and concentration increases with time 05/21/2016 - 12:10 Anonymous
1 HF concentrations in multi-element standards 05/21/2016 - 12:10 Anonymous
1 Diluted blends of single element standards 05/21/2016 - 12:10 Anonymous
1 Mercury stability in different matrices 05/21/2016 - 12:10 Anonymous
1 Matrix for alkali and alkaline earth ICP standards 05/21/2016 - 12:10 Anonymous
1 ICP multi-element solution incompatibilities 05/21/2016 - 12:10 Anonymous
1 Overcoming gold stability issues 05/21/2016 - 12:10 Anonymous
1 64 element calibration standards 05/21/2016 - 12:10 Anonymous
1 Extending CRM expiration period 05/21/2016 - 12:10 Anonymous
1 Standards and digestions for perovskite oxides (BaLaSnO3) 05/21/2016 - 12:10 Anonymous
1 Contaminants of ethanol in HDPE 05/21/2016 - 12:10 Anonymous
1 Stability of mercury (Hg) in plastic bottles 05/21/2016 - 12:10 Anonymous
1 Mercury (Hg) in multi-element standards 05/21/2016 - 12:10 Anonymous
1 Lead (Pb) instability in HNO3 05/21/2016 - 12:10 Anonymous
1 Silicon (Si) stability in sodium peroxide fusions 05/21/2016 - 12:10 Anonymous
1 Au stability in aqua regia 05/21/2016 - 12:10 Anonymous
1 HF in rare earth sample preparations 05/21/2016 - 12:10 Anonymous
1 Multi-element calibration curves and compatibility 05/21/2016 - 12:10 Anonymous
1 Element compatibility for ICP-OES standards 05/21/2016 - 12:10 Anonymous
1 Stability of aliquots of pH and conductivity standards 05/21/2016 - 12:10 Anonymous
1 Cold storage for Cr(VI) standards 05/21/2016 - 12:10 Anonymous
1 Transportation and storage temperature 05/21/2016 - 12:10 Anonymous
1 Incompatible metals in solution 05/21/2016 - 12:10 Anonymous
1 Oxidation states in IV products. 05/21/2016 - 12:10 Anonymous
1 Extending the expiration period 05/21/2016 - 12:10 Anonymous
1 Mixing tungsten in multi-element standard 05/21/2016 - 12:10 Anonymous
1 Starting material for ICP sulfur (S) standards 05/21/2016 - 12:10 Anonymous
1 Contamination from bottles 05/21/2016 - 12:10 Anonymous
1 Low levels of mercury stabililzed with gold 05/21/2016 - 12:10 Anonymous
1 Silver (Ag) nanoparticle analysis by ICP-OES 05/21/2016 - 12:10 Anonymous
1 Blending cadmium (Cd), lead (Pb) and copper (Cu) 05/21/2016 - 12:10 Anonymous
1 TCT - Bottle expiration versus lot expiration 05/21/2016 - 12:10 Anonymous
1 High silver (Ag) recoveries using ICP-MS 05/21/2016 - 12:10 Anonymous
1 Multi-element standard compatibility and preparation 05/21/2016 - 12:10 Anonymous

General Spectroscopy

Answers Question Updated
0 TCLP extract recovery issues 11/21/2017 - 17:08 Brittany Meyer
1 Use of 6-lithium as internal standard 11/02/2017 - 15:30
1 Calculating concentrations from chemical formulas 11/02/2017 - 09:07
1 Carbon and chloride standards for food analyses 11/02/2017 - 09:03
1 Concentration ranges for QCP products 11/02/2017 - 08:39
1 Nitrogen products for TOC analyzer 11/01/2017 - 15:38
1 ICP products for Ion Chromatography (IC) 11/01/2017 - 12:01
1 ICP standards and XRF analyses 11/01/2017 - 09:10
1 General references for ICP-OES applications and repairs 11/01/2017 - 08:17
1 Using ICP standards for ion chromatogrpahy (IC) 11/01/2017 - 08:03
1 Basic setup solutions for ICP-MS 11/01/2017 - 07:56
1 Mercury (Hg) methods for sludge and wastewater samples 10/31/2017 - 12:53
1 Differences between ICP and IC standards 10/31/2017 - 12:45
1 Calculations for diluting standards 10/31/2017 - 10:26
2 Hexavalent chromium (Cr+6) by ICP-MS 11/11/2016 - 09:24 Anonymous
1 Different stock multi-element standards: AA, CMS, or CCS? 11/11/2016 - 08:32 Anonymous
1 Certified concentration of a standard 11/04/2016 - 09:33 Anonymous
1 Method for determining Ni and Sr 11/04/2016 - 08:21 Anonymous
1 Using ICP standards for AA 11/04/2016 - 08:15 Anonymous
1 Sulfur (S) from MSA for ICP-MS 11/02/2016 - 10:24 Anonymous
1 Starting materials for QCP-NUT-2 05/21/2016 - 12:10 Anonymous
1 Depleted or natural abundance uranium and associated radioactivity 05/21/2016 - 12:10 Anonymous
1 Nitric acid as oxidizing agent 05/21/2016 - 12:10 Anonymous
1 Measuring lithium (Li) using Li isotopes 05/21/2016 - 12:10 Anonymous
1 Trace metal impurity data 05/21/2016 - 12:10 Anonymous
1 Different Li products as ionization buffers 05/21/2016 - 12:10 Anonymous
1 Solid reference material for EPA methods 3050B and 6020 05/21/2016 - 12:10 Anonymous
1 Is CGCR(3)1 free of Cr+6 (hexavalent chromium) 05/21/2016 - 12:10 Anonymous
1 Using QCP-OG-A with ethylene ether extraction 05/21/2016 - 12:10 Anonymous
1 Stock products for 2015 USP<232> specifications 05/21/2016 - 12:10 Anonymous
1 Determination of arsenic in sediment 05/21/2016 - 12:10 Anonymous
1 Nitrilotriacetate (NTA) standard for UV-vis colorimetry 05/21/2016 - 12:10 Anonymous
1 Mechanical pipettes and concentrated acids 05/21/2016 - 12:10 Anonymous
1 ICP standards with AAS methods 05/21/2016 - 12:10 Anonymous
1 Two methods for certification 05/21/2016 - 12:10 Anonymous
1 Specific assay information on the CoA 05/21/2016 - 12:10 Anonymous
1 Method for measuring potassium (K) in buffered solution 05/21/2016 - 12:10 Anonymous
1 Cesium as ionization buffer 05/21/2016 - 12:10 Anonymous
1 KHP as standard for combustion analyzer 05/21/2016 - 12:10 Anonymous
1 XRF vs. ICP for metals in concrete 05/21/2016 - 12:10 Anonymous
1 High resolution versus quadrapole ICP-MS for Pt analyses 05/21/2016 - 12:10 Anonymous
1 Difference between 1-5% HNO3 matrices 05/21/2016 - 12:10 Anonymous
1 ICP starts poorly 05/21/2016 - 12:10 Anonymous
1 Effect of impurities in ICP standards 05/21/2016 - 12:10 Anonymous
1 Standards suitable for screening for all metals 05/21/2016 - 12:10 Anonymous
1 Methods for concrete analysis 05/21/2016 - 12:10 Anonymous
1 Cleaning quartzware used to digest organics 05/21/2016 - 12:10 Anonymous
1 Matching wavelengths for ICP-OES internal standards 05/21/2016 - 12:10 Anonymous
1 Alkali metals (rubidium) analysis by AA and ICP-OES 05/21/2016 - 12:10 Anonymous
1 How are AA and ICP standards certified? 05/21/2016 - 12:10 Anonymous
1 Sulfur analysis of filters with XRF 05/21/2016 - 12:10 Anonymous
1 Differences between ICP and AA standards 05/21/2016 - 12:10 Anonymous
1 Prolonging expiration dates 05/21/2016 - 12:10 Anonymous
1 Mercury from mercury chloride (HgCl2) 05/21/2016 - 12:10 Anonymous
1 Can ICP-MS standards be used for ICP-OES 05/21/2016 - 12:10 Anonymous
1 ICP-MS sensitivity optimization 05/21/2016 - 12:10 Anonymous
1 Finding analyte information specific to soil reference materials 05/21/2016 - 12:10 Anonymous
1 Starting material and certified value for 6-Li standards 05/21/2016 - 12:10 Anonymous
1 Multi-element standards for urine and serum 05/21/2016 - 12:10 Anonymous
1 Measuring ammonia (NH3) using ICP-OES 05/21/2016 - 12:10 Anonymous
1 As, Cr, and Cu standards prepared from salts 05/21/2016 - 12:10 Anonymous
1 Solid alloy standards for aluminum (Al) and other metals 05/21/2016 - 12:10 Anonymous
1 Method 200.7 Interference Check Standards 05/21/2016 - 12:10 Anonymous
1 Impurities standards for pharmaceuticals testing 05/21/2016 - 12:10 Anonymous

Measurement and Results

Answers Question Updated
0 TCLP extract recovery issues 11/21/2017 - 17:08 Brittany Meyer
1 Separating nitrite and sulfate using ion chromatography (IC) 11/02/2017 - 09:30
1 QC failure for iron (Fe) using ICP-OES 11/02/2017 - 09:23
1 AA products for ICP analyses 11/01/2017 - 11:50
1 Products for EPA Method 200.7 11/01/2017 - 11:02
1 Determining interelement correction (IEC) factors 11/01/2017 - 09:44
1 Iodide in human serum or plasma by ICP-MS 11/01/2017 - 09:03
1 SiO2 (silica) calibration and reporting Si (silicon) 11/01/2017 - 08:33
1 Using an SIC (Spectral Interference Check) 11/01/2017 - 08:28
1 Erbium standards and aluminum alloy analyses 11/01/2017 - 08:07
1 Trace HF and Si analyses by ICP-OES 10/31/2017 - 12:50
1 Choosing calibration regression equations 10/31/2017 - 12:15
1 Direct measurement of nanoparticles 10/31/2017 - 10:48
1 Standard for nitrogen as ammonia (Standard Methods 4500 NH3-B) 11/11/2016 - 10:11 Anonymous
1 Lowest uncertainties for NIST-traceable pH buffer 11/11/2016 - 10:06 Anonymous
1 Internal standard basics 11/10/2016 - 14:51 Anonymous
1 Low molybdenum (Mo) recoveries for powdered metals 11/10/2016 - 14:47 Anonymous
1 Rare earth element ICP interferences 11/10/2016 - 14:11 Anonymous
2 High As and Se recoveries on ghost wipes 11/10/2016 - 13:41 Anonymous
1 RBS-25 as ICP cleaning solution 11/10/2016 - 13:11 Anonymous
1 Source of custom vs. single-element standards 11/10/2016 - 11:09 Anonymous
1 AA standards compared to ICP standards 11/10/2016 - 11:01 Anonymous
1 Uranium (U) standard for 235-U and 238-U 11/10/2016 - 10:28 Anonymous
1 Data comparison at detection limits 11/10/2016 - 09:00 Anonymous
1 Silicon (Si) vs. silica (SiO2) MP-AES measurements 11/09/2016 - 15:16 Anonymous
1 Verification of ICP-MS intermediate working standards 11/09/2016 - 15:09 Anonymous
1 What is the best possible uncertainty for a CRM? 11/04/2016 - 13:38 Anonymous
1 Nominal vs. certified concentrations 11/04/2016 - 12:40 Anonymous
1 Using a cesium (Cs) buffer for ICP-OES measurements 11/04/2016 - 11:40 Anonymous
1 ICP sulfur (S) analysis in pH neutral solutions 11/04/2016 - 11:29 Anonymous
1 Differences between IC and ICP standards 11/04/2016 - 10:50 Anonymous
1 Total Kjeldahl nitrogen source in QCP-NUT-2 11/04/2016 - 09:49 Anonymous
1 Infrared moisture analysis of QCP-SLD 11/04/2016 - 09:45 Anonymous
1 Preparation of oxalate standard (C2O4) 11/04/2016 - 08:12 Anonymous
1 ICP-MS Fe interferences on priority pollutant metals 11/02/2016 - 11:44 Anonymous
1 Silicon (Si) ICP-MS solutions 11/02/2016 - 11:30 Anonymous
1 High magnesium (Mg) ICP-OES results 11/02/2016 - 11:26 Anonymous
1 Tungsten (W) and Iridium (Ir) ICP-MS drift 11/02/2016 - 10:20 Anonymous
1 Selecting an ICP-MS standard 11/01/2016 - 09:04 Anonymous
1 NIST SRMs used for mercury (Hg) assays 11/01/2016 - 09:00 Anonymous
1 Contamination from tobacco smoke 05/21/2016 - 12:10 Anonymous
1 Ca and Mg impurities in LACB1 05/21/2016 - 12:10 Anonymous
1 ICP-OES measurement uncertainty 05/21/2016 - 12:10 Anonymous
1 Troubleshooting mercury (Hg) and antimony (Sb) by ICP-MS 05/21/2016 - 12:10 Anonymous
1 Expressing sensitivity for ICP applications 05/21/2016 - 12:10 Anonymous
1 Phosphorus as phosphate ion chromatography standards 05/21/2016 - 12:10 Anonymous
1 Coverage factor k = 2 05/21/2016 - 12:10 Anonymous
1 Measuring chloride in milk using ICP-MS 05/21/2016 - 12:10 Anonymous
1 Sources of uncertainty in analytical methods 05/21/2016 - 12:10 Anonymous
1 Choosing interference check standards 05/21/2016 - 12:10 Anonymous
1 Interferences on tin (Sn) using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Resources for measuring drinking water by ICP-MS 05/21/2016 - 12:10 Anonymous
1 Uncertainty associated with limit of quantitation (LOQ) 05/21/2016 - 12:10 Anonymous
1 High pH solutions in ICP-MS analyses 05/21/2016 - 12:10 Anonymous
1 Potable and wastewater standards 05/21/2016 - 12:10 Anonymous
1 Antimony (Sb) drift in ICV and LCS using ICP-MS 05/21/2016 - 12:10 Anonymous
1 TOCKHP1 as standard for HACH Method 10129 05/21/2016 - 12:10 Anonymous
1 Differences between tuning and wavelength calibration standards 05/21/2016 - 12:10 Anonymous
1 Method detection limits 05/21/2016 - 12:10 Anonymous
1 Control sample failure in ICP-OES measurement 05/21/2016 - 12:10 Anonymous
1 Is Os traceable to NIST? 05/21/2016 - 12:10 Anonymous
1 Calculating weighing uncertainty 05/21/2016 - 12:10 Anonymous
1 Using IC compound standards for ICP 05/21/2016 - 12:10 Anonymous
1 ICP-OES vs. XRF for metals in catalyst powder 05/21/2016 - 12:10 Anonymous
1 Hexavalent chromium (Cr) by ICP 05/21/2016 - 12:10 Anonymous
1 Poor calibration for Ca, Mg, Fe, Zn, and K using ICP-MS 05/21/2016 - 12:10 Anonymous
1 Acceptable linearity slope variance 05/21/2016 - 12:10 Anonymous
1 Custom multi-element standard 05/21/2016 - 12:10 Anonymous
1 Measuring NTA (nitrilotriacetate) using EPA Method 430.1 05/21/2016 - 12:10 Anonymous
1 Choosing internal standards for ICP-OES 05/21/2016 - 12:10 Anonymous
1 Uncertainty in ICP water analyses 05/21/2016 - 12:10 Anonymous
1 How to make a Na, K, Ca, Cl solution from salts 05/21/2016 - 12:10 Anonymous
1 Applying F-test results to control charts 05/21/2016 - 12:10 Anonymous
1 Natural or depleted uranium in custom ICP products 05/21/2016 - 12:10 Anonymous
1 Controlling transpiration 05/21/2016 - 12:10 Anonymous
1 Low bias for Sn and Sb quality control samples 05/21/2016 - 12:10 Anonymous
1 Silicon measurements by ICP-MS and interferences 05/21/2016 - 12:10 Anonymous
1 Calibration curves for ICP-MS analysis 05/21/2016 - 12:10 Anonymous
1 Using Indium (In) as internal standard 05/21/2016 - 12:10 Anonymous
1 Tungsten measurements - general information 05/21/2016 - 12:10 Anonymous
1 Poor linearity for Bi using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Acceptance limits for water QC standards 05/21/2016 - 12:10 Anonymous
1 Sulfur analysis using ICP 05/21/2016 - 12:10 Anonymous
1 Measuring S (sulfur) in the presence of Pb (lead) 05/21/2016 - 12:10 Anonymous
1 Cleaning platinum (Pt) crucibles 05/21/2016 - 12:10 Anonymous
1 Zinc interferences on sodium using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Internal standard for Pd, Rh, Cu, and Li 05/21/2016 - 12:10 Anonymous
1 Selecting emission line for Sn in palm oil analysis 05/21/2016 - 12:10 Anonymous
1 ICP standards as recovery tests for wastewater digestions 05/21/2016 - 12:10 Anonymous
1 Problems achieving MDL for Pb using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Arsenic (As) line interferences from iron (Fe) 05/21/2016 - 12:10 Anonymous
1 Total silica measurement using colorimetric method 05/21/2016 - 12:10 Anonymous
1 Eliminating high and erratic lead (Pb) blanks 05/21/2016 - 12:10 Anonymous
1 Converting IC chloride (Cl) results to chlorine (Cl2) 05/21/2016 - 12:10 Anonymous
1 Certification and validation of reference materials 05/21/2016 - 12:10 Anonymous
1 Valence state of dysprosium 05/21/2016 - 12:10 Anonymous
1 Instrument detection limits 05/21/2016 - 12:10 Anonymous
1 REE and Sb contamination 05/21/2016 - 12:10 Anonymous
1 Turbidity standard based upon formazin 05/21/2016 - 12:10 Anonymous
1 High background counts at mass 220 using ICP-MS 05/21/2016 - 12:10 Anonymous
1 Poor recoveries and QC failures by ICP-OES 05/21/2016 - 12:10 Anonymous
1 Acceptance limits for water standards (QCP-SLD) 05/21/2016 - 12:10 Anonymous
1 Memory efects for nickel (Ni) after interference check 05/21/2016 - 12:10 Anonymous
1 Comparing Co emission lines using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Internal standards for Ca, Fe, Zn by ICP-MS 05/21/2016 - 12:10 Anonymous
1 Bromide standards for IC and ICP 05/21/2016 - 12:10 Anonymous
1 Correcting for Ca oxide interferences on As 05/21/2016 - 12:10 Anonymous
1 Variable mercury (Hg) results using ICP-OES 05/21/2016 - 12:10 Anonymous
1 Interferences between bismuth (Bi) and HF 05/21/2016 - 12:10 Anonymous
1 Relative precision in ICP-MS standards 05/21/2016 - 12:10 Anonymous
1 Types of ICP-MS interferences 05/21/2016 - 12:10 Anonymous
1 Positive interference mercury (Hg) mass 202 05/21/2016 - 12:10 Anonymous
1 Acetic acid in ASTM D4929 05/21/2016 - 12:10 Anonymous
1 Tin (Sn) in HCl using ICP-MS 05/21/2016 - 12:10 Anonymous
1 Metal analysis in HBr by ICP 05/21/2016 - 12:10 Anonymous

Sample Preparation

Answers Question Updated
0 TCLP extract recovery issues 11/21/2017 - 17:08 Brittany Meyer
1 Creation of 1000 mL High Standard 11/20/2017 - 09:26 Justin Lee
1 Silicon in siloxane 11/02/2017 - 15:33
1 Preparation of liver tissue for iron (Fe) analyses 11/02/2017 - 09:13
1 Vegetable oil preparation for trace nickel (Ni) 11/02/2017 - 08:59
1 Matrix modifiers for GFAA (graphite furnace atomic absorption) 11/02/2017 - 08:56
1 Poor Mn recovery for soil standards 11/02/2017 - 08:40
1 Organic tin (Sn) digestions 11/02/2017 - 08:27
1 Osmium (Os) stability and microwave digestions 11/01/2017 - 15:31
1 HF neutralization with UniSolve (UNS) products 11/01/2017 - 11:34
1 Copper (Cu) / Zirconium (Zr) alloy method 11/01/2017 - 11:31
1 Palladium (Pd) analysis of liquid catalyst 11/01/2017 - 10:46
1 Sulfur loss during EPA Method 200.7 digestion 11/01/2017 - 10:43
1 Osmium (Os) as internal standard 11/01/2017 - 08:46
1 Neutralizing HF and stabilizing metals 11/01/2017 - 07:58
1 Gold analysis and recovery in LDPE 10/31/2017 - 10:12
1 Oxidation of HCl by HNO3 10/31/2017 - 10:10
1 Neutralizing HF and cleaning plastic bottles 10/31/2017 - 09:53
2 Quantifying silicon in silicone oil by ICP-OES 08/25/2017 - 08:32 Anonymous
1 Silicone digestion with KOH 08/18/2017 - 09:20 Anonymous
1 Palladium (Pd) and platinum (Pt) in activated carbon 11/11/2016 - 09:02 Anonymous
1 Ashing, decomposition techniques for fluoropolymers 11/11/2016 - 08:44 Anonymous
2 UniSolv references and leaching LDPE bottles 11/11/2016 - 08:04 Anonymous
1 High osmium (Os) recoveries for ICH Q3D methods 11/10/2016 - 13:01 Anonymous
1 Hot block vs. classic acid digestion for geochemical analyses 11/09/2016 - 15:21 Anonymous
1 Tin (Sn) analysis in oils 11/09/2016 - 14:23 Anonymous
1 Sulfur (S) analysis in glucose 11/09/2016 - 14:09 Anonymous
1 Iron carbonate (FeCO3) digestion for Hg, Pb ICP-MS analysis 11/09/2016 - 13:53 Anonymous
1 Hexavalent chromium (Cr+6) analysis in stainless steel alloys 11/04/2016 - 11:43 Anonymous
1 Liquid-liquid heavy metal extractions using organic solvents 11/04/2016 - 10:03 Anonymous
1 Digestion for copper-iron (Cu-Fe) alloys 11/04/2016 - 09:59 Anonymous
1 Sn sample digestions 11/02/2016 - 11:24 Anonymous
1 Digesting organic-rich sedimentary rocks 11/01/2016 - 09:16 Anonymous
1 Aluminum oxide fusion 11/01/2016 - 08:56 Anonymous
1 Dissolution of silicon in metals 05/21/2016 - 12:10 Anonymous
1 Measuring Sn in oil 05/21/2016 - 12:10 Anonymous
1 Total suspended solids standard from microcrystalline cellulose 05/21/2016 - 12:10 Anonymous
1 Silicon (Si) analysis of polydimethylsiloxane (PDMS) 05/21/2016 - 12:10 Anonymous
1 Analyzing for bromine by ICP 05/21/2016 - 12:10 Anonymous
1 Fusions for Ti analysis in rubber 05/21/2016 - 12:10 Anonymous
1 Digesting Pt oxide 05/21/2016 - 12:10 Anonymous
1 Neutralizing HF with TEA (triethanolamine) 05/21/2016 - 12:10 Anonymous
1 Using UA, UNS product digestions of Ti 05/21/2016 - 12:10 Anonymous
1 Ashing technique for metals 05/21/2016 - 12:10 Anonymous
1 Quartz powder sample preparation 05/21/2016 - 12:10 Anonymous
1 Dissolving graphite to measure by ICP 05/21/2016 - 12:10 Anonymous
1 Mercury (Hg) analysis in dimethyl sulfoxide (DMSO) 05/21/2016 - 12:10 Anonymous
1 Trace metal analysis of air condensate 05/21/2016 - 12:10 Anonymous
1 Iron oxide pigment analysis by ICP 05/21/2016 - 12:10 Anonymous
1 Analyzing silicone oils 05/21/2016 - 12:10 Anonymous
1 Preparation of silicon standards 05/21/2016 - 12:10 Anonymous
1 Low-alloy steel analysis by ICP 05/21/2016 - 12:10 Anonymous
1 Reactions of sulfur and bromine 05/21/2016 - 12:10 Anonymous
1 Filter papers for EPA Method 353.2 05/21/2016 - 12:10 Anonymous
1 Determination of mercury (Hg) in biological matrices 05/21/2016 - 12:10 Anonymous
1 Minimum HCl necessary for platinum chloride 05/21/2016 - 12:10 Anonymous
1 Tungsten (W) and molybdenum (Mo) oxide digestion 05/21/2016 - 12:10 Anonymous
1 KOH and Si-O-Si bonds 05/21/2016 - 12:10 Anonymous
1 Analyzing the mineral composition of concrete 05/21/2016 - 12:10 Anonymous
1 Graphite digestion using HClO4 / H2SO4 with vanadium catalyst 05/21/2016 - 12:10 Anonymous
1 Preparing standards similar to NIST SRM 1643 05/21/2016 - 12:10 Anonymous
1 Digestion method for molybdenum carbide 05/21/2016 - 12:10 Anonymous
1 Wet ashing procedure for carbon black 05/21/2016 - 12:10 Anonymous
1 Matrices for soil preparation 05/21/2016 - 12:10 Anonymous
1 Carbon steel digestion 05/21/2016 - 12:10 Anonymous
1 Sample preparation without organic solvents 05/21/2016 - 12:10 Anonymous
1 Fusing process for titanium oxides 05/21/2016 - 12:10 Anonymous
1 Determination of mercury (Hg) in sediment 05/21/2016 - 12:10 Anonymous
1 Leaching silicon from graphite 05/21/2016 - 12:10 Anonymous
1 Analyzing wax for total mercury by CVAF 05/21/2016 - 12:10 Anonymous
1 Procedure for measuring palladium in mesoporous silica 05/21/2016 - 12:10 Anonymous
1 Digestion method for Rh coated Pt 05/21/2016 - 12:10 Anonymous
1 Tin and thallium soil extraction 05/21/2016 - 12:10 Anonymous
1 Coal sample digestions 05/21/2016 - 12:10 Anonymous
1 How to prepare and analyze asbestos by ICP-OES 05/21/2016 - 12:10 Anonymous
1 Scaling UA, UNS procedures 05/21/2016 - 12:10 Anonymous
1 Analysis of sediment samples for Cs 05/21/2016 - 12:10 Anonymous
1 Fusion of titanium dioxide with potassium pyrosulfate 05/21/2016 - 12:10 Anonymous
1 Potassium pyrosulfate fusion of titanium oxide 05/21/2016 - 12:10 Anonymous
1 Using blue HDPE containers 05/21/2016 - 12:10 Anonymous
1 Lead (Pb) alloy digestion 05/21/2016 - 12:10 Anonymous
1 Ashing procedure for tin in elastomers 05/21/2016 - 12:10 Anonymous
1 HF best way to keep W in solution 05/21/2016 - 12:10 Anonymous