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在痕量和超痕量分析中,对所使用的化学试剂要预先提纯,常常是十分必要的。因为一些高灵敏度的分析方法和仪器常因试剂空白值过高而无法达到它应有的检出极限,既使是“优级纯”和“高纯”试剂,有时也难以满足痕量分析的要求。实验表明,自己制备的巯基棉能定量吸附水溶液中的近二十种痕量元素,具有良好的吸附性和选择性。它不仅在痕量元素的富集与分离上有广泛的应用,而且也可有效地用于多种化学试剂的提纯以去除某些痕量无机杂质元素。本文仅对它在无机盐类中去除重金属杂质中的应用作以简单介绍。
In trace and ultra-trace assays, it is often necessary to pre-purify the chemicals used. Because some highly sensitive analytical methods and instruments often fail to achieve their desired detection limits due to reagent blank values too high, it is sometimes difficult to meet the requirements of trace analysis Claim. Experiments show that the prepared thiol cotton can quantitatively adsorb nearly 20 kinds of trace elements in aqueous solution, and has good adsorption and selectivity. It not only has a wide range of applications in the enrichment and separation of trace elements, but also can be effectively used for the purification of a variety of chemical reagents to remove some trace inorganic impurity elements. This article only its inorganic salts in the removal of heavy metal impurities in the application for a brief introduction.