海洋沉积物中多元素分析测定方法

The analysis methods of heavy metals in marine sediment

介绍了海洋沉积物消化及多元素分析的测定方法。分析测定过程中 ,应选用国家标准溶液。标准溶液的蒸发次数、加酸量、稀释倍数等对样品测定结果的准确性均有一定影响。消化过程中 ,过多的蒸发次数对微量元素 Cr、V的测定结果有明显影响 ,蒸发的次数越多 ,元素的损失量越大 ,因此 ,为了获得更准确的测定结果 ,应尽可能减少蒸发次数 ,并减少加酸量 ;测定常量元素时 ,样品较大的稀释倍数使获得数据的可靠性增大 ,通常 0 .2 5 g样品应稀释至 5 0m L,0 .5 g样品应稀释至 1 0 0 m L。

The paper discussed the selection of two digestion bottles and proposed a systematic process of digestion of sediment. Aiming at the questions in the process of analysis, the author put forward some pieces of rational advice. The study suggests the concentration of element Cr and V is decreased with the increase number of times of evaporating.