Comparison Of Different Microwave Digestion Methods For Heavy Metals From Stream Sediment Article Swipe
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· 2016
· Open Access
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· DOI: https://doi.org/10.2991/aeecs-16.2016.32
· OA: W2464075748
Appropriate digestion of environmental sample, including soil, sediment and dust, plays a key step in their total heavy metal detection.In order to explore the optimized digestion method, 8 kinds of commonly used hybrid acids groups were selected to simultaneously detect total concentrations of Pb and Cd in stream sediment using microwave digestion instrument.The result showed that method 6HNO 3 +2HCl+2HF, 8HNO 3 +4HCl+4HF, 5HNO 3 +2HClO 4 +8HF had better digestion effects than others through the comparison of digestion solutions.Furthermore, the detection result based on 6HNO 3 +2HCl+2HF was basically in the range of standard reference value GBW07310.The average concentrations of Pb and Cd were 23.44 mg/kg and 1.045 mg/kg, while the effectiveness of detection results using the other two methods were quite difference with reference value.Therefore, hybrid acids group 6HNO 3 +2HCl+2HF was identified as the best digestion method in this study.
