Sample Preparation

do you have any standard for the total suspended solid test?

Can we use HF acid for hot block digestion. we need to develop method to determine total silica and other alkali in soil samples.

Can you help me with digestion or leaching of molecular sieve to extract lead from it. lead analysis will be done by ICPMS. Thank you Ramakrishna B

I recently asked a question about dissolving Rh and now want to try one of the methods with sodium perchlorate. The bottle i have says to store and handle under inert gas and this wasn't mentioned in the method. Can you give me anymore information about moving forward with this procedure? I am wanting to dissolve a 1 gram sample. How much HCL and how much Sodium Perchlorate should be added?

What is the best way to digest pure rhodium?

in ur application XRF VS ICP for concrete metals u have given a sample preparation using fused bead and then dissolving in Dilute nitric acid, i wanted to know whether the sample dissolves completely in the dil nitric acid or do you get some insoluble for that and then u filter to inject in ICP ?

in ur application XRF VS ICP for concrete metals u have given a sample preparation using fused bead and then dissolving in Dilute nitric acid, i wanted to know whether the sample dissolves completely in the dil nitric acid or do you get some insoluble for that and then u filter to inject in ICP ?

I am currently trying to develop a method for determining impurities in primary lead and recycled secondary lead. I have been struggling to get good recovery for my elements the current method of digestion used involves using Nitric Acid, perchloric acid and precipitating out of lead using hydrochoric Acid. I used a CRM as a sample and i was not getting the expected concentrations for my Elements. I dont

I have some catalyst composed of PtPdRu/C. However, Pd and Ru are difficult to get dissolved even in aqua regia. Is there any solution to get their composition from ICP?

Hi all,

We recently purchased a ThermoFisher iCap RQ ICP-MS. We are analyzing 14 metals in our Dimethyl Sulfoxide (DMSO) product. We utilize open-cup evaporation on a hot plate followed by reconstituting in 2%HNO3 & 0.5% HCl. Currently, I am adding 30mL of DMSO sample into a teflon beaker, then spiking from a stock solution an aliquot equivalent to 1ppb of the 14 metal solution. I allow the sample to evaporate to dryness (between a pin-tip and a light char mark). I then use my diluent to squirt into the cup ~5-10mL. This portion is transferred to a sample vial and diluted back up to 30mL. 

I am struggling with recovery. The data is inconsistent to say the least. My 2ppb samples are sometimes lower than my 1ppb samples. Sometimes they are 2-3 times higher than they should be. 

Performance reports look great, and standard curve looks great. 

Any tips for improving recovery of metals following evaporation? Any help would be highly appreciated. Thanks in advance.

Andrew