| Development of Certified Reference Materials for Analysis of Heavy Metals in Paints to Cope with Environmental Regulations |
| 환경규제 대응을 위한 페인트 중의 중금속 분석용 인증 표준물질 개발 |
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유병규, 선일식 |
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(재)한국화학시험연구원 |
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| Abstract |
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In the areas of RoHS, WEEE, ELV and REACH, reinforcement of environmental regulations against harmful substances is a global trend not only in EC but also in all over the world. In the fields of Korea's major export products such as material parts, electrical and electronic products and automobile parts, we are responding to these regulations consistently. To develop reference material for analyzing lead and cadmium in paints, the candidate materials were produced through the screening process which separated shapes and sizes. To secure the traceability of the candidate materials produced, the characteristics and uncertainties are estimated by ICP-AES analysis using the primary reference material. The short-term and long-term stabilities also are evaluated in parallel. In order to calculate the final certification value of the candidate material, the verification were carried out by the performance evaluation through the comparison among the KOLAS (Korea Laboratory Accreditation Scheme) laboratories, and the CRM was produced in accordance with ISO Guide 35. The certified values and uncertainties of Pb and Cd of the final paint standard, determined according to the joint analysis among laboratories, are Pb [(191.4±3.1) mg/kg, (944.1±5.6) mg/kg] and Cd [(45.0±2.6) mg/kg, (225.5± 3.5) mg/kg]. These standard materials were developed to enhance the reliability of measurement analysis, including the validity and traceability of measurement results. Also it is expected that the CRM will be used as QCM (quality control material) for the product design and the process monitoring, so that regulation and management of hazardous heavy metals can be systematically implemented. |
| Key Words:
Paint, CRM, Lead, Cadmium, Hazardous substances, Heavy metals, Traceability |
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