Determination of Beryllium in Soil and Sediment by Graphite Furnace Atomic Absorption with a Microwave-Acid Digestion Method
LIN Hai-lan1,2, GAN Jie1,2, YU Lei1,2, ZHU Ri-long1,2,3, TIAN Yun1,2, LUO Yue-ping1,2*
1. Hunan Province Environmental Monitoring Cerner, Changsha 410019, China 2. State Environmental Protection Key Laboratory of Monitoring for Heavy Metal Pollutants, Changsha 410019, China 3. College of Water Sciences, Beijing Normal University, Beijing 100875, China
Abstract：A method for determination of beryllium in soils and sediments by microwave-acid digestion/graphite furnace atomic absorption (GFAA) is described. In this paper, the working conditions of the instrument are optimized, the drawing of calibration curve is expounded, the pretreatment process of soil and sediments (including microwave heating process and the selection of digestion system) is discussed, and the interference of coexisting elements is examined. The sample was pretreated by microwave digestion parameters using HNO3/HCl/HF mixed acid system. The method is fast and simple without matrix modifier, and has no interference by coexisting ions, and has high repeatability and reproducibility. Under the optimal experimental conditions, the limit of detection (LOD) is 0.004 9 mg·kg-1 (sample quantity 0.200 0 g, sample volume 25 mL), and the limits of quantitation (LOQ) is 0.020 mg·kg-1. This method is used to measure the standard samples and actual samples, whether in the laboratory, or between laboratories, has good accuracy and precision.
Key words：Microwave-acid digestion;GFAA;Soil and sediment;Beryllium
林海兰1,2，甘 杰1,2，于 磊1,2，朱日龙1,2,3，田 耘1,2，罗岳平1,2* . 微波酸溶/石墨炉原子吸收分光光度法测定土壤和沉积物中铍 [J]. 光谱学与光谱分析, 2015, 35(11): 3275-3280.
LIN Hai-lan1,2, GAN Jie1,2, YU Lei1,2, ZHU Ri-long1,2,3, TIAN Yun1,2, LUO Yue-ping1,2* . Determination of Beryllium in Soil and Sediment by Graphite Furnace Atomic Absorption with a Microwave-Acid Digestion Method. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(11): 3275-3280.
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