荣荣回复于2006/12/16
你是发错地方了,还是怎么着??鉴于你是新兵,帖子暂不删除, 但是不要灌水了
redanqi可是新官上任三把火呀!
westliferaise回复于2006/12/13
你好,我没有发附件
stargazer回复于2006/11/29
Another problem with Hg is loss during sample preparation. When performing acid digestions, the use of closed vessel digestion or the use of condensers should be considered. Ashing should be avoided. Only use validated sample preparation procedures.
汞还有另外一个问题,就是在制样时候的损失。当进行酸消解时,应该考虑采用密闭消解或是冷凝器。避免采用灰化消解。只采用有效的标准制样方法。
气质回复于2006/11/29
我来尝试一下。
Another problem with Hg is loss during sample preparation. When performing acid digestions, the use of closed vessel digestion or the use of condensers should be considered. Ashing should be avoided. Only use validated sample preparation procedures.
Here are some additional suggestions when working with mercury:
The presence of reducing agents in the solution may reduce Hg to the metal causing false high results due to the volatility of the element where the introduction system delivers more Hg to the plasma as a result.
The use of plastic introduction systems will cause unusually long washout times. Glass is preferred and the use of HCl rather than nitric acid will reduce the washout time.
The use of nitric acid matrices for ppb Hg determinations by ICP-MS should only be attempted using Au as a stabilizing agent (see above link).
汞的另一个问题是样品制备期间的损失,在酸消解时,推荐使用封闭的消解系统或冷凝器。应当避免样品灰化。最好使用经过验证的样品制备程序。
当工作中遇到汞时,这里有一些附加的意见:
溶剂中还原剂的存在会使汞变为金属导致错误的高结果,是由于在进样体系传递过程中有挥发性元素携带过多汞进入等离子体的结果。
使用塑料进样系统将使清洗时间明显延长。最好是使用玻璃进样系统,而且使用盐酸胜于硝酸可以减少清洗时间。
ICP-MS测试硝酸混合液中ppb级汞的含量应当尝试用金做为稳定剂(参见上文的链接)。