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HG-AFS Determination of Selenium in Yantao with Ultrasonic Assisted Sample Digestion

Xiang Ji-ming

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Abstract

As a modification for method of sample pretreatment of the standard(GB/T 5009.93-2003),ultrasonic treatment for 20 min was adopted in the sample digestion of yangtao with the mixed acid of HNO3 and HClO4(2+3).The content of selenium was then determined by HG-AFS same as described in the standard.Detection limit(3s/k) was founed to be 0.01 μg·L-1.The proposed method was applied to the analysis of a yangto sample for 5 replicate determinations,giving value of RSD(n=11) 4.6%.The results obtained were in consistency with those obtained by GB standard method.

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What this paper is about

As a modification for method of sample pretreatment of the standard(GB/T 5009.93-2003),ultrasonic treatment for 20 min was adopted in the sample digestion of yangtao with the mixed acid of HNO3 and HClO4(2+3).The content of selenium was then determined by HG-AFS same as described in the standard.Detection limit(3s/k) was founed to be 0.01 μg·L-1.The proposed method was applied to the analysis of a yangto sample for 5 replicate determinations,giving value of RSD(n=11) 4.6%.The results obtained were in consistency with those obtained by GB standard method.

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Available abstract

As a modification for method of sample pretreatment of the standard(GB/T 5009.93-2003),ultrasonic treatment for 20 min was adopted in the sample digestion of yangtao with the mixed acid of HNO3 and HClO4(2+3).The content of selenium was then determined by HG-AFS same as described in the standard.Detection limit(3s/k) was founed to be 0.01 μg·L-1.The proposed method was applied to the analysis of a yangto sample for 5 replicate determinations,giving value of RSD(n=11) 4.6%.The results obtained were in consistency with those obtained by GB standard method.

Key concepts: Selenium, Detection limit, Digestion (alchemy), Standard addition, Chromatography, Chemistry, Sample (material), Ultrasonic sensor

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