Abstract
沉积物中介形类壳体的Sr/Ca和Mg/Ca比值可用于湖泊古盐度和古温度的重建。本文从双通道顺序扫描式ICP-AES的特点出发,对μg级介形类样品中的低含量元素Sr和Mg选择最灵敏谱线和最佳通道,对各项条件进行最优化。Sr和Mg的检测限分别为1.1μg╱L和1.4μg/L。本文以此法准确测定了介形类样品中Sr/Ca比值和Mg/Ca比值,回收率实验结果令人满意。;Sr/Ca and Mg/Ca ratios of ostracod shells in lacustrine sediments can be used to reconstruct the palaeotemperature and palaeosalinity of lakes.According to the characteristics of the double channel sequential scan inductively coupled plasma atomic emission spectrometry (ICP-AES), the most sensitive emission lines and optimum channels are chosen to determine trace Sr and Mg of gamma grade ostracod shells sample,while all determined conditions are optimized.The detection limits of Sr and Mg are 1.lμg/L and 1.4/μg/L respectively.In this paper,Sr/Ca and Mg/Ca ratios are accurately determined, and the recovery test is satisfactory.
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