冷原子荧光测汞法玻璃仪器洗涤小经验

• 作 者: 吕森伟
• 机 构: 浙江丽水环保监测站,
• 出 处: 理化检验.化学分册
• 发表日期: 1990年04期
• 关键词: 测汞法 比色管 玻璃仪器 冷原子荧光 空白值 去离子水 水冲 玻璃容器 空白试验 汞离子

冷原子荧光测汞法,方法的灵敏度很高,所使用的玻璃仪器稍不干净,就会干扰测定。因玻璃对汞的吸附能力很强,所以采用一般书本上所介绍的硝酸(1+1)浸泡过夜,自来水冲洗,然后用无汞离子交换水冲干净,这种方法用于直接装水样消解的玻璃容器(以比色管为例)就不行,特别是新使用的。故此笔者采用KMnO_4-H_2SO_4-HNO_3法清洗比色管,效果颇佳。把所有玻璃仪器用硝酸(1+1)浸泡之后,自来水冲洗,然后用去离子水冲洗干净,晾干备用。而新使用的消解容器-比色管,则需如下处理:用5%KMnO_4-

Cold atomic fluorescence mercury method, the method of high sensitivity, the glass instrument used is a little dirty, it will interfere with the determination. Because glass absorbs mercury strongly, so use the general book described in nitric acid (1 + 1) soaking overnight, tap water rinse, and then washed with mercury-free ion exchange water clean, this method is used for direct water sample digestion Glass containers (with colorimetric tube as an example) will not work, especially the new use. Therefore, I use KMnO_4-H_2SO_4-HNO_3 method to clean the colorimetric tube, the effect is quite good. After all the glassware is soaked in nitric acid (1 + 1), rinse it with running water, then rinse it off with deionized water and dry it for later use. The newly used digestion container - colorimetric tube, you need to deal with: 5% KMnO_4-