Determination of Quartz in Presence of Silicates Using Phosphoric Acid
Determination of Quartz in Presence of Silicates Using Phosphoric Acid
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使用磷酸测定硅酸盐存在下的石英
DOI：
10.1021/ac60052a021
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发表时间：
1951
影响因子：
7.4
通讯作者：
N. Talvitie
中科院分区：
文献类型：
--
作者：
N. Talvitie
目前的标准评估涉及呼吸含尘空气的矽肺危害，要求测定粉尘和产尘材料的游离二氧化硅含量。本文介绍了一种在硅酸盐矿物存在时进行测定的方法。用磷酸加热粉尘样品，使硅酸盐矿物溶解。用水稀释磷酸后，过滤分离游离二氧化硅残留物并称重。12至20分钟的加热时间足以溶解工业粉尘中常见的大多数硅酸盐矿物。该方法适用于快速测定各种岩石、矿石、粘土和工业粉尘中的石英，并且只需要最简单的实验室设备即可执行。
Present standards for the evaluation of the silicosis hazard involved in breathing dusty air call for determinations of the free silica content of dusts and dust-producing materials. A method is described for accomplishing these determinations when sili-cate minerals are present. The silicate minerals are dissolved by heating the sample of dust with phos-phoric acid. After dilution of the phosphoric acid with water, the residue of free silica is separated by filtration and weighed. A heating period of 12 to 20 minutes suffices to dissolve most of the silicate min-erals commonly present in industrial dusts. The method is adaptable to the rapid determination of quartz in a wide variety of rocks, ores, clays, and industrial dusts, and requires only the simplest of laboratory equipment for its execution.