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离子交换树脂的应用广泛,几乎遍及各学科领域与工业生产。但由于保管不善或别的偶然原因,有时会将树脂搞混,不辨阴阳。常用的鉴别方法是首先用浓NaCl溶液分离可能存在的混合树脂,再以酸、碱转型,洗至中性后用NaCl溶液洗脱,测量洗脱液的pH值,确定离子交换树脂的阴阳。此法颇为繁锁费事;若用pH滴定法测绘滴定曲线来确定树脂的阴阳,就更为费事了。
Ion exchange resins are widely used in almost all disciplines and industrial production. However, due to poor storage or other accidental reasons, sometimes the resin confused, do not distinguish between yin and yang. The common identification method is to separate the possible mixed resin with concentrated NaCl solution first, and then to acid, alkali transformation, washed with NaCl solution after neutralization, measured the pH of the eluate to determine the yin and yang of the ion exchange resin. This method is quite complicated and cumbersome; if pH titration curve titration curve to determine the resin’s yin and yang, even more troublesome.