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本文采用氯电极直接电位法测定硝酸钾等十多种玻璃原料中的氯化物,较通常采用的氯化银比浊法准确、灵敏、快速。 (一)仪器与试液制备 1.氯离子选择性电极:HDCL型,湖南大学化工系。 2.甘汞电极:217型。盐桥溶液为0.1MKCl溶液,盐桥套管中加入1M KNO_3(0.5％琼脂)溶液。 3.雷磁25型pH计:采用-mV档,量程0～700毫伏。试液的制备: 按以下方法制备试液。试样溶好后,
In this paper, chlorine electrode direct potential method for the determination of more than 10 kinds of raw materials, such as potassium nitrate chloride, more commonly used silver chloride turbidimetric method accurate, sensitive and fast. (A) Preparation of instruments and test solution 1. Chloride ion selective electrode: HDCL type, Hunan University Department of Chemical Engineering. 2. calomel electrode: 217 type. Salt bridge solution is 0.1MKCl solution, salt bridge cannula 1M KNO_3 (0.5% agar) solution. 3. Leica Magmeter 25-type pH meter: -mV file, range 0 ~ 700 millivolts. Preparation of test solution: Prepare the test solution as follows. After the sample is dissolved,