用光度法测定大白鼠脏器中微量稀土元素的报道目前还未见过。由投饲含稀土食物的毒性实验得知,稀土元素主要蓄积于肝和骨中。取样中含的钙、铁等干扰元素较高,给直接光度法测定带来困难。武大余席茂等研制的新显色剂三溴偶氮胂[2-(2-胂酸基苯偶氮)-7-(2,4,6-三溴苯偶氮)-1,8-二羟基萘-3,6-二磺酸],在pH1的盐酸介 The spectrophotometric determination of traces of rare earth elements in rats has not been reported. Toxicity experiments with food containing rare earths revealed that rare earth elements mainly accumulate in the liver and bone. Sampling contains calcium, iron and other interference elements higher, to the direct photometric method to bring difficulties. Wu Dafu Ximao developed a new reagent tribromoarsenazo [2- (2-arsanophenylazo) -7- (2,4,6-tribromophenylazo) -1,8-dihydroxy Naphthalene-3,6-disulfonic acid], hydrochloric acid medium at pH 1