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Determination of Lead and Cadmiun in Water by GFAAS

Zhonglan Chen

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Abstract

The operating conditions of Graphite Furnace Atomic Absorption Spectrometry(GFAAS) were optimized.A method for the determination of lead and cadmium in water by digesting samples with digestion instrument,deuterium lamp background correct and GFAAS was established.K2Cr2O4 and NH4H2PO4 were used as matrix modifier in the determination of lead and Cadmium by GFAAS.The linear range was 0.00~20.00 ng·mL-1 with r=0.999 8 and RSD≤1.026% for Lead.Linear range was 0.00~15.00 ng·mL-1 with r=0.999 8 and RSD≤1.038% for cadmium.The recovery experiments for both elements were satisfactory,96.5%~101.1% for lead,and 98%~103.1% for cadmium.

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What this paper is about

The operating conditions of Graphite Furnace Atomic Absorption Spectrometry(GFAAS) were optimized.A method for the determination of lead and cadmium in water by digesting samples with digestion instrument,deuterium lamp background correct and GFAAS was established.K2Cr2O4 and NH4H2PO4 were used as matrix modifier in the determination of lead and Cadmium by GFAAS.The linear range was 0.00~20.00 ng·mL-1 with r=0.999 8 and RSD≤1.026% for Lead.Linear range was 0.00~15.00 ng·mL-1 with r=0.999 8 and RSD≤1.038% for cadmium.The recovery experiments for both elements were satisfactory,96.5%~101.1% for lead,and 98%~103.1% for cadmium.

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Available abstract

The operating conditions of Graphite Furnace Atomic Absorption Spectrometry(GFAAS) were optimized.A method for the determination of lead and cadmium in water by digesting samples with digestion instrument,deuterium lamp background correct and GFAAS was established.K2Cr2O4 and NH4H2PO4 were used as matrix modifier in the determination of lead and Cadmium by GFAAS.The linear range was 0.00~20.00 ng·mL-1 with r=0.999 8 and RSD≤1.026% for Lead.Linear range was 0.00~15.00 ng·mL-1 with r=0.999 8 and RSD≤1.038% for cadmium.The recovery experiments for both elements were satisfactory,96.5%~101.1% for lead,and 98%~103.1% for cadmium.

Key concepts: Graphite furnace atomic absorption, Cadmium, Chemistry, Mass spectrometry, Linear range, Lead (geology), Detection limit, Matrix (chemical analysis)

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