By using sulpho acid to dissociate samples, using spectrophotometric method to determine micro-chrome in drainage sedimentary is very easy and simple with low cost.
采用王水分解样品，分光光度法测定水系沉积物样品中微量铬，方法简便，易操作，成本低。
2
If best analysing condition of each element is deter mined, As, Sb, Bi, Hg and Se in agricultural geology samples can be determined continuously in sulpho acid medium.