【摘要】 三七中总砷及无机砷按GB/T5009.11-2003进行了大量的测试。三七试样经湿消解,加入硫脲使五价砷还原为三价砷,再加入硼氢化钾使其还原生成砷化氢,和氩气一起进入石英原子化器中分解为原子态砷,测其荧光强度,得总砷。未经消解的三七试样在6mol/L盐酸和水浴条件下,无机砷以氢化物形式被提取,实现无机砷和有机砷的分离,在2mol/L盐酸条件下测定,同总砷原理。通过对大量测试数据的分析,讨论了其无机砷在总砷中所占含量的百分比及毒性。更多还原

【Abstract】 According to the GB/T 5009.11-2003,SanQi sample was digested,reduction to arsenic(3)from arsenic (5) with addition of thiourea,and farther reducted to arsenic hydride with potassium borohydride,and introduced to quantz atomizer with argon gas,and dissociated to atomic asenium。 The total arsenium was determined by fluorecence.The sample was extracted with 6mol/L HCl aqueous bath,the inorganic arsenium was separated,and determined in 2mol/L with the same method as before。The ratio of inorganic arsenium and the total and its toxicity were discussed based on the data from the measurements.更多还原