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铝在自然界中分布很广,在地壳组成中储含量占第三位,主要存在于含铝矿石和粘土中。自来水厂一般用铝盐混凝剂来净化水,但是如果铝盐加注量过高或净化效果不良,处理后的水中可能有多量剩余铝存在。水中铝的测定常用铬天青光分光光度法和铬青R分光光度法及原子吸收火焰法,前两种方法处理复杂,反应条件严格,干扰严重;而火焰法需用N2O—乙炔焰,灵敏度不高,水中微量铝很难测出。采用原子吸收法石墨炉,对水样直接测定,准确度高,灵敏
Aluminum is widely distributed in nature and accounts for the third largest amount of crustal composition, mainly in aluminum-bearing ores and clays. Water plants generally use aluminum salt coagulant to purify water, but if the aluminum salt is too high or the purification effect is not good, the treated water may have a large amount of surplus aluminum. Determination of aluminum in water commonly used Chromium Cyanuric Spectrophotometry and Chromium Green R spectrophotometry and atomic absorption flame method, the first two methods of processing complex, severe reaction conditions, serious interference; and flame method requires N2O-acetylene flame, Sensitivity is not high, trace aluminum is difficult to measure in water. Graphite furnace with atomic absorption method, direct determination of water samples, high accuracy and sensitivity