Inorganic standards &
Custom reference materials

June 2015 Newsletter

ICP Operations & Techniques September 22, 2015 • Blacksburg, VA

Inductively Coupled Plasma (ICP) has long been recognized as a superior analytical technique for elemental determinations. Introduced in the 1980's, analytical labs around the world have used various ICP techniques, to achieve reliable trace measurements. However, ICP measurements are only as reliable as the equipment, sample preparation and lab analyst conducting them.

Which is the ideal ICP-MS system for my needs? How do I prepare a superior sample for accurate results? What factors are influencing my testing results?

Find out the answers to these and many additional ICP topics at our ICP Operations & Techniques one day intensive conference inside the beautiful Inn at Virginia Tech & Skelton Conference Center. All conference attendees will also have the opportunity to tour the Inorganic Ventures headquarters and get an inside look at our operation!

Click here to find out more and register today!

Ask The Experts

Q: Measurement and Results

Would you please help me solve some problems about your pH Buffer Standards? We purchased your pH 4 and pH 10 buffers. We must confirm that they comply with the preparation method of APHA Standard Method Table 4500-H+:I. Can you help me provide the concentration of primary standards used for said pH buffer preparation? e.g. whether the pH 4 is 0.05M potassium hydrogen phthalate and pH 10 is 0.025M sodium bicarbonate+0.025M sodium carbonate at 25C or not. We cannot find more detailed information from your MSDS about the standard chemicals used.


We certify all pH buffers vs. NIST SRM’s (Standard Reference Materials). Our standards are certified under Standard Method Table 4500-H+, compliant with ISO Guide 34 requirements.

The NIST standards, against which we certify each lot of pH buffer, are prepared following the exact instructions on the Certificates of Analysis that accompany the NIST SRMs:

NIST pH 4 standard is 0.05 mol/kg potassium hydrogen phthalate, NIST SRM 185h

  • Certification testing is performed at 20C.
  • The certified values for the pH buffer at the other temperatures are calculated from the Table 1 on the NIST certificate.

NIST pH 10 standard is 0.025 mol/kg solution sodium bicarbonate/sodium carbonate, NIST SRM 191d

  • Certification testing is performed at 20C.
  • The certified values for the pH buffer at the other temperatures are calculated from the Table 1 on the NIST certificate.

Click here for more Technical Questions Answered by our Experts.

Guides & Papers

USP 232 and ICH Q3D

The United States Pharmacopeia (USP) and the International Conference on Harmonization (ICH) both specify limits for elemental impurities in drug products. The USP specifications are detailed in General Chapter 232, and the ICH limits are provided in the Guideline for Elemental Impurities Q3D. Read our detailed article discussing elements common to both USP 232 and ICH Q3D and the issue of chemical stability. Is it possible to create a stable ICP standard that contains all the elements described in both USP 232 and ICH Q3D? Read More.

Jokes & Riddles

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If Iron Man and Silver Surfer teamed up, they'd be alloys.