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Human urine certified reference material for arsenic speciation.

J Yoshinaga1, A Chatterjee, Y Shibata

  • 1National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba, Ibaraki 305-0053, Japan. junyosh@k.u-tokyo.ac.jp

Clinical Chemistry
|November 9, 2000
PubMed
Summary
This summary is machine-generated.

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A new certified reference material (CRM) for human urine is now available for arsenic speciation analysis. This CRM supports accurate biological monitoring of inorganic arsenic exposure.

Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Toxicology

Background:

  • Chemical speciation analysis of arsenic in urine is crucial for biological monitoring.
  • There is a growing need for certified reference materials (CRMs) for arsenic speciation in urine.

Purpose of the Study:

  • To develop and certify a human urine matrix as a reference material for arsenic speciation.
  • To provide a reliable standard for analytical quality assurance in arsenic exposure monitoring.

Main Methods:

  • Collected urine from non-occupationally exposed Japanese males.
  • Prepared and freeze-dried 954 bottles of urine (10 mL each).
  • Confirmed homogeneity and certified values through collaborative analysis by 15 laboratories.

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Main Results:

  • Certified values established for arsenobetaine, dimethylarsinic acid, and total arsenic.
  • Certified values also determined for total selenium and zinc.
  • Reference values provided for copper and lead.

Conclusions:

  • NIES CRM No. 18 Human Urine is the first CRM for arsenic speciation in human urine.
  • This CRM is valuable for analytical quality assurance in biological monitoring of arsenic exposure.