摘要
研究了在高压消解瓶内升温增压下,用王水对重晶石中铅浸取,并用火焰原子吸收光谱法测定浸出的铅。试验表明,在180℃加热3h,铅的浸取量最大,用该法浸取铅比在常温常压下更完全,相对标准偏差为2.20%～3.72%,回收率为95.2%～100.4%,方法检出限为0.12mg·L-1。
It was found that lead in barite, probably in the form of PbS or PbSO_4, can be extracted more efficiently with aqua regia at 180℃ and under pressure for 3h in a tightly covered PTFE vessel. After dilution and filtration, lead(Ⅱ) in the solution was then determined by FAAS under optimized instrumental condition. Detection limit of this method was found to be 0.12mg·L^(-1), the RSD′s were between 2.20% to 3.72%, and the recoveries found by the standard addition method were in the range from 95.2% to 100.4%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2004年第6期343-344,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
