A simple way to quantify arsenic in blood

Although there is considerable literature on the issue of quantitative determination of As in the blood (Strizhevsky, Bang, etc.), but the complexity of manipulations in determining this element, the low stability of standards in colorimetric determinations by Marsch'y and other methods, the need to prepare these standards ex tempore and the inability titration determination of very small amounts of As has made the As determination not so widely used in clinical laboratory practice, as it seemed necessary in some cases of arsenic therapy.