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Material Database:
SRM 3037 - Arsenous Acid (AsIII) Standard Solution
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| Type |
Certified reference material |
| Producer |
National Institute of Standards and Technology (NIST)
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| Status |
Available |
| Material |
Solution |
| Reference |
SRM 3037 |
| Catalog (Web) |
https://shop.nist.gov/ccrz__ProductDetails?sku=3037&cc
lcl=en_US |
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Description
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This Standard Reference Material (SRM) is intended for use as a primary calibration standard for the quantitative determination of the arsenic species arsenous acid (AsIII). This SRM can be used for quality assurance when assigning values to in-house control materials. High purity arsenic trioxide was purchased from a commercial vendor to produce the SRM. This material was dissolved at NIST using sodium hydroxide and then stabilized with hydrochloric acid to prevent oxidation of the AsIII to AsV. Aliquots of the SRM were later dispensed into ampoules.
keywords: Speciation analysis, Arsenic speciation
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Package |
A unit of SRM 3037 consists of two 10 mL sealed borosilicate glass amber ampoules of an acidified aqueous solution prepared gravimetrically to contain a known mass fraction of arsenous acid. The solution contains hydrochloric acid at a volume fraction of approximately 1 %, which is equivalent to a concentration (molarity) of approximately 0.12 mol/L. Due to digestion of the starting material, arsenic trioxide, with sodium hydroxide, sodium is present in the ampoules at approximately 1000 mg/kg. |
Parameter
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| Analyte | Arsenic | | Specification | inorganic As(III), Arsenite | | Parameter | Certified value | | Unit | mg/kg | | Result | 1.0442 ± 0.0020 | |
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