Organic compounds

methylmercury, ethylmercury, tributyltin, butyltin, enriched methylmercury, enriched ethylmercury, enriched tributyltin, enriched butyltin

ISC-Science produces Reference Materials (RM) of isotopically enriched compounds for Isotope Dilution and ICP-MS and/or GC-MS applications.

Isotopic abundance values are reported as percentage [amount fraction (*100), %] and concentration values as micrograms of cation per gram of solution (μg/g). According to ISO 17034 and ISO/IEC 17025, the concentration value was determined by Gas Chromatography with Mass Spectrometry (GC-MS) using a reference method in a single laboratory [Isotope Dilution Mass Spectrometry (IDMS)] and isotopic abundances were determined by measuring the isotope-amount ratios for all isotopes of the element by GC-MS using the enriched isotope as reference. The expanded uncertainty for each value was calculated as U = 2 · u, where k = 2 is the coverage factor for a 95% confidence interval and u is the combined standard uncertainty calculated according to ISO Guide 35. The value of u is intended to represent the combined effect of uncertainty components associated with IDMS determination, homogeneity and stability for concentration values and the GC-MS determination for abundance values.

Stability of this material is based upon rigorous long-term (storage conditions) and short-term (transport conditions) testing of the solution for the values according to ISO 17034 and ISO Guide 35. This testing includes, but is not limited to, the effect of temperature.

marca acreditacion ISC-Science is a Reference Material Producer accredited by ENAC with accreditation no. 3/PMR004. ENAC is a signatory to the EA and ILAC Multilateral Agreements for Reference Material Producers.

Check the Technical Annex here.


Reference Materials (RM) are provided with the following general characteristics:

Our Reference Materials can be used in Isotope Dilution Analysis to: Assessment of a measurement procedure and/or quality control, except bias control. Check ISO Guide 33 as a guidance for the good practice in using reference materials.

 - for specific information about the characteristics of a product, please contact us at The characteristics shown here are general for all products within this category.

The different marketed standards are shown below. To see the specific characteristics of each product, click on the product name.

199Hg-enriched Methylmercury

199Hg-enriched Methylmercury - Reference Material

Isotopically enriched compound for the analysis of Methylmercury by Isotope Dilution.

201Hg-enriched Methylmercury

201Hg-enriched Methylmercury - Reference Material

Isotopically enriched standard for the analysis of Methylmercury by Isotope Dilution.

198Hg-enriched Ethylmercury

198Hg-enriched Ethylmercury - Reference Material

Isotopically enriched compound for the analysis of Ethylmercury by Isotope Dilution.

119Sn-enriched Butyltin Mix

119Sn-enriched Butyltin compounds - Reference Material

Isotopically enriched compounds for the analysis of Monobutyltin (MBT), Dibutyltin (DBT) and Tributyltin (TBT) by Isotope Dilution. 

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