masking reagent

The selectivity of the method may be increased by addition of thiocarbamide as masking reagent and pre-separation of the interferential elements using NH_3-NH_4Cl. This method is simple, rapid and accurate.

加入硫脲作掩蔽剂和用NH3-NH4CI预分离干扰元素可提高方法的选择性。

Mercury in crude gold has been determined directly without separation by AAS with potassium thiocyanate as the masking reagent for gold and SnCl_2as reductant to reduce mercury into the vapour atomic mercury in NaOH medium.

以硫氰酸甲作金的掩蔽剂，用SnCl2在强碱介质中还原化合汞为原子汞进行汞的冷原子吸收测定。

Mixing colour solution contains isopropyl alcohol, triethanolamine, masking reagent and Br-PADAP.

载流溶液为异丙醇，混合显色剂组分为异丙醇、三乙醇胺、Br－PADAP和掩蔽剂。

Computer treatment of acidity conditions of reactions between organic agent and metallic ion when masking reagent is present

具掩蔽剂存在金属离子与有机试剂反应适宜酸度条件的计算机处理

Nm, with ascorbic acid as a reducing reagent, thiourea as a masking reagent, iron, cobalt, copper and indium could be masked.

用抗坏血酸为还原剂，硫脲为掩蔽剂，可以掩蔽铁、钴、铜、铟。

A method for the determination of arsenic, antimony and bismuth in high purity zinc by hydride generation-atomic fluorescence spectrometry ( HG-AFS) with thiourea-ascorbic acid-hydroxylamine hydrochloride as masking and reducing reagent has been proposed.

提出了以硫脲-抗坏血酸-盐酸羟胺作为混合还原掩蔽剂，氢化物发生-原子荧光光谱法（HG-AFS）测定高纯锌中砷、锑、铋的方法。

After adding some masking agents, the reagent is applied to determinate Pb(ⅱ) in water standard samples.

在一定掩蔽剂的作用下，试剂可用于测定环境水质标准样品中铅的测定。