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Material Database:
NIES CRM 13-A: Human Hair
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| Type |
Certified reference material |
| Producer |
National Institute for Environmental Studies (NIES)
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| Status |
Available |
| Material |
Powder |
| Reference |
NIES 13-a |
| Catalog (Web) |
https://www.nies.go.jp/labo/crm-e/index.html |
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Description
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This environmental certified reference material (CRM) was developed and certified by the National Institute for Environmental Studies (NIES) for the determination of methylmercury and selected heavy metals analysis of human hair and other samples with similar matrices. This CRM is the successor to NIES CRM No. 13 Human Hair, which was produced at NIES in 1996. Analyses for mercury isotopes were also performedto obtain information values. The raw material for this CRM is scalp hair of east Asian women. It was washed with non-ionic detergent, crushed using a roll press and a cold grinding pin mill, and classified (74 µm or less) by the air jet sieve method and homogenized. The powdered samples were packed 3 g each in 806 glass bottles and sterilized by 60Co irradiation (20 kGy). keywords: biological materials , human tissue , hair , trace elements , heavy metals , mercury speciation , speciation analysis , organometallics
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Package |
The CRM is supplied as fine black powder of 3 g in a glass bottle.
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Parameter
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| Analyte | Arsenic | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 0.255 ± 0.016 | |
| Analyte | Cadmium | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 0.165 ± 0.012 | |
| Analyte | Lead | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 7.42 ± 0.62 | |
| Analyte | Mercury | | Specification | methylmercury | | Parameter | Certified value | | Unit | mg/kg | | Result | 0.858 ± 0.075 | |
| Analyte | Mercury | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 1.06 ± 0.07 | |
| Analyte | Selenium | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 0.463 ± 0.052 | |
| Analyte | Zinc | | Specification | total element mass fraction | | Parameter | Certified value | | Unit | mg/kg | | Result | 337 ± 22 | |
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Related Links
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EVISA Brief summary: CRMs for speciation analysis
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