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矿石中钠、钾成份的测定,多年来一直采用火焰光度法和原子吸收分光光度法,而原子吸收法是一种简便快速,是其他化学法所不及。但在测定钾长石中的钾,钠时,因钾长石除溶于氢氟酸外其他酸都不溶解。当用氢氟酸和硝酸溶解时部份的钾,钠与铝形成胶体氟化铝钾和氟化铝钠,此氟化物难溶于水。所以氟的存在影响钾,钠的测定。因此要求在测定钾,钠前,需将氟除掉。可采用在铂皿中加硝酸和氢氟酸分解后,焙烧,测定的结果很好,但增加焙烧过程,手续烦琐。为了解决氟的挥发问题,
Determination of sodium and potassium in the ore has been using flame photometry and atomic absorption spectrophotometry for many years, whereas the atomic absorption method is a simple and fast method that is beyond the reach of other chemistries. However, in the determination of potassium feldspar in the potassium, potassium feldspar due to dissolve in addition to hydrofluoric acid other acids are not dissolved. When dissolved in hydrofluoric acid and nitric acid, part of potassium, sodium and aluminum form colloidal aluminum potassium fluoride and sodium aluminum fluoride, which are poorly soluble in water. So the presence of fluoride affect the determination of potassium and sodium. Therefore, the determination of potassium, sodium, before the need to remove fluorine. Can be used in the platinum dish after nitric acid and hydrofluoric acid decomposition, roasting, the determination of the results very good, but increase the roasting process, the procedure cumbersome. In order to solve the problem of volatile fluorine,