Direct spectrophotometric determination of traces of fluoride in rain water
Direct spectrophotometric determination of traces of fluoride in rain water
复制标题
直接分光光度法测定雨水中痕量氟化物
DOI：
10.2116/bunsekikagaku.52.485
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发表时间：
2003
期刊：
影响因子：
0.2
通讯作者：
Y. Seike
中科院分区：
文献类型：
--
作者：
M. Okumura;Tomohiro Yoshimura;K. Fujinaga;Y. Seike
使用市售试剂“Alfusone （DOJINDO）”开发了雨水中的氟化物量。为了提高测定水样中氟化物的灵敏度，采用5cm玻璃池代替传统方法中使用的1cm玻璃池进行分光光度测定。在5cm细胞中，试剂空白的吸光度随着色溶液中Alfusone的浓度成比例增加。以1%的Alfusone溶液为最佳上色液。考察了其他最佳条件，如显色时间和其他离子的影响。测定范围为10 ~ 500µg/l，用25或10 ml水样测定。所建立的方法成功地应用于雨水样品、淡水和地下水样品中氟化物的测定。
amounts of fluoride in rain waters using a commercially available reagent, “Alfusone (DOJINDO)”, has been developed. In order to increase the sensitivity in the determination of fluoride in water samples, a 5-cm glass cell was used for spectrophotometric measurements instead of a 1-cm glass cell, which was used in conventional methods. The absorbances of the reagent blank in the 5-cm cell increased in proportion to the concentration of Alfusone in a coloring solution. As an opti-mal coloring solution, a 1 ％ Alfusone solution was adopted. The other optimum conditions, such as the standing time for color development and the effect of other ions, were also exam-ined. The determination range was 10 〜 500 µ g/l of fluoride by using 25 or 10 ml of a water sample. The established method was successfully applied to the determination of fluoride in rain water samples as well as fresh river and ground water samples.