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对硅酸盐岩石中的钾钠测定,目前除火焰光度法可分别测定其钾钠含量外,普遍用氢氟酸分解试样,石灰抽提.最后用酸碱容量法测定其钾钠总量。此法手续烦琐.抽提时间长。笔者认为比较简单而系统的分析此两元素,是在塑料王坩埚(或铂金坩埚)中.用硫酸氢氟酸消化试样后,用酸碱容量法测定钾钠总量。用季胺盐容量法测定钾,即可求出钠的含量。用此消化母液仍可用于测定Fe、Al、Ti、Ca、Mg等元素。季胺盐容量法测定钾,设备简单,操作方便,滴定终点突变明显,重复性好。1978年对78个试样两次重复测定,除个别最大相对偏差为0.14%外,普遍在0.02～0.05%之间,平均0.04%。此方法较适应基层工厂化验室的分析。此法在一些单位己作为钾的常规分析方法。
Sodium silicate rock in the determination of potassium, at present except the flame photometric determination of its potassium and sodium content, the general use of hydrofluoric acid decomposition of the sample, lime extraction.At the end of the acid-base capacity method to determine the total amount of potassium . This method is cumbersome procedures. Extraction of a long time. The author believes that the relatively simple and systematic analysis of these two elements is in the plastic crucible (or platinum crucible). After digestion of the sample with sulfuric acid and hydrofluoric acid, the total amount of sodium and potassium was determined by the acid-base volumetric method. Quaternary ammonium salt volumetric method for the determination of potassium, you can find the sodium content. With this digestion mother liquor can still be used for the determination of Fe, Al, Ti, Ca, Mg and other elements. Quaternary ammonium salt volumetric method for the determination of potassium, the device is simple, easy to operate, titration end point mutation was obvious, good repeatability. In 1978, 78 samples were repeatedly measured twice, with the exception of some of the maximum relative deviation of 0.14%, generally between 0.02 to 0.05%, an average of 0.04%. This method is more suitable for the analysis of grass-roots factory laboratories. This method has been used in some units as a routine method of potassium analysis.