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2007•Practical Preventive MedicineRequires access

Determination of Blood Lead by GFAAS Using Improved Matrix Modifier

Xie Hong-bin

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Abstract

Objective To develop a modified method for detecting blood lead by GFAAS using an improved matrix modifier,which eliminate the matrix interference effectively.Methods Samples were digested by HNO3+H2O2,and matrix modifier was NH4H2PO4+ HNO3+Vit C,and then detected by GFAAS.Results The recovery rate was 92.7%～100.8%,and relative standard deviation(RSD) was 2.9%～5.7%.The detection limit was 4.2ug/L.This method satisfactory with Blood Lead Clinical Laboratory Technical Specification by Ministry of Health.Conclusion The modified method is simple,convenient,accurate and with good reproducibility.The result is satisfactory.

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What this paper is about

Objective To develop a modified method for detecting blood lead by GFAAS using an improved matrix modifier,which eliminate the matrix interference effectively.Methods Samples were digested by HNO3+H2O2,and matrix modifier was NH4H2PO4+ HNO3+Vit C,and then detected by GFAAS.Results The recovery rate was 92.7%～100.8%,and relative standard deviation(RSD) was 2.9%～5.7%.The detection limit was 4.2ug/L.This method satisfactory with Blood Lead Clinical Laboratory Technical Specification by Ministry of Health.Conclusion The modified method is simple,convenient,accurate and with good reproducibility.The result is satisfactory.

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Available abstract

Objective To develop a modified method for detecting blood lead by GFAAS using an improved matrix modifier,which eliminate the matrix interference effectively.Methods Samples were digested by HNO3+H2O2,and matrix modifier was NH4H2PO4+ HNO3+Vit C,and then detected by GFAAS.Results The recovery rate was 92.7%～100.8%,and relative standard deviation(RSD) was 2.9%～5.7%.The detection limit was 4.2ug/L.This method satisfactory with Blood Lead Clinical Laboratory Technical Specification by Ministry of Health.Conclusion The modified method is simple,convenient,accurate and with good reproducibility.The result is satisfactory.

Key concepts: Christian ministry, Detection limit, Reproducibility, Matrix (chemical analysis), Recovery rate, Relative standard deviation, Lead (geology), Chromatography

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