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提出以聚酰胺树脂为吸附剂，在弱酸和中性介质中，静态和动态操作条件下，对环境水中铬（Ⅵ）和铬（Ⅲ）的选择性吸附分离方法。在选定条件下，树脂对铬（Ⅵ）有很强的吸附能力，饱和吸附容量为１０．６ ｍｇ／ｇ（水介质中）和１２．８ｍｇ／ｇ（ｐＨ１．０的Ｈ２ＳＯ４介质中），而铬（Ⅲ）几乎不被吸附，当铬（Ⅵ）和铬（Ⅲ）含量比在１：５～５：１范围变化时均可得到满意分离。用０．０２ｍｏｌ／Ｌ硫酸。０．０２５ ｍｏｌ／Ｌ抗坏血酸混合液解脱树脂上吸附的铬（Ⅵ），再以二苯碳酰二肼光度法测定，并将其用于实际水样中铬（Ⅵ）和格（Ⅲ）的分离和测定。
A selective adsorptive separation method of chromium (Ⅵ) and chromium (Ⅲ) in environmental water using polyamide resin as adsorbent under mild and neutral conditions under static and dynamic operating conditions was proposed. Under the selected conditions, the resin has a strong adsorption capacity for chromium (Ⅵ) with a saturated adsorption capacity of 10.6 mg / g (in aqueous medium) and 12.8 mg / g (pH1.0 in H2SO4) However, chromium (Ⅲ) is hardly adsorbed, and satisfactory separation can be achieved when the chromium (Ⅵ) and chromium (Ⅲ) contents vary from 1: 5 to 5: 1. With 0.02mol / L sulfuric acid. Chromium (Ⅵ) adsorbed on the resin was eluted by 0.025 mol / L ascorbic acid mixture, and then determined by diphenylcarbazide spectrophotometry and used for the determination of chromium (Ⅵ) and Isolation and determination.