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本法原理雷锁辛指示剂(тропеолин《ОО》)的酒精溶液呈强的黄褐色,该溶液与钙游子和镁游子反应则生成沉淀;此时,溶液颜色强度的变化与硬度成反比。试剂0.4%雷锁辛指示剂溶液:精确秤取0.4克雷锁辛指示剂置小型烧杯中,加入不超过50ml的95°酒精,并将小块用玻棒捣碎,然后将其移入100ml的量瓶中,用蒸馏水稀至刻度,以无灰滤纸滤过后,将瓶塞塞紧贮存之。
The principle of this method of Leixinsin indicator (тропеолин “ОО”) alcohol solution was strong brown, the solution and the calcium and magnesium atoms react precipitated; this time, the color intensity of the solution is inversely proportional to the hardness. Reagents 0.4% Leixin indicator solution: Accurately weigh 0.4 grams of Leuconazole indicator into a small beaker, add not more than 50ml of 95 ° alcohol, and small pieces with a glass rod mashed, and then transferred to 100ml of Volumetric flask, dilute to the mark with distilled water to filter the ashless filter paper, the bottle stopper stuffed tightly.