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引用本文:唐鹊辉,王妙,胡韧,韩博平,彭亮.淡水可溶性硅的4种测定方法比较.湖泊科学,2014,26(3):410-416. DOI:10.18307/2014.0311
TANG Quehui,WANG Miao,HU Ren,HAN Boping,PENG Liang.Comparison of four methods for determination of soluble silicon in freshwater. J. Lake Sci.2014,26(3):410-416. DOI:10.18307/2014.0311
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淡水可溶性硅的4种测定方法比较
唐鹊辉, 王妙, 胡韧, 韩博平, 彭亮
暨南大学水生生物研究中心, 广州 510632
摘要:
通过加标回收和野外水样测定,对用于淡水可溶性硅测定的4种比色法进行比较,同时研究了实验过程中玻璃容器对4种方法测定结果的影响以及磷酸根离子对显色的干扰.结果表明:1,2,4氨基萘酚磺酸还原硅钼蓝法的灵敏度和准确性高,适合常规水样中可溶性硅的测定,最适检测浓度范围为0.05~20 mg/L;米吐尔还原硅钼蓝法和抗坏血酸还原硅钼蓝法灵敏度高但准确性低;硅钼黄法操作简单但灵敏度低.测定过程所使用的玻璃容器对4种方法的测定结果没有影响,磷酸根离子的干扰能被消除.
关键词:  可溶性硅  比色法  1,2,4氨基萘酚磺酸还原硅钼蓝法  玻璃容器  磷酸根离子干扰
DOI:10.18307/2014.0311
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基金项目:
Comparison of four methods for determination of soluble silicon in freshwater
TANG Quehui, WANG Miao, HU Ren, HAN Boping, PENG Liang
Institute of Hydrobiology, Jinan University, Guangzhou 510632, P. R. China
Abstract:
Four photocolorimetric methods have been comparatively studied for determining soluble silicon in freshwater. Meanwhile, the effects of glass containers on the determination and the interference of the phosphate ion on chromogenesis were also investigated. It was demonstrated that 1, 2, 4-trichlorobenzene amino phenol sulfonic acid reduction-silicon molybdenum blue method is highly sensitive and accurate for the determination of soluble silicon in fresh water, and has an optimal concentration range from 0.05-20 mg/L. Ascorbic acid reduction-silicon molybdenum blue method and metol reduction-silicon molybdenum blue method are highly sensitive but less accurate; silicon molybdenum yellow method is simple in operation but with low sensitivity. Glass containers used do not influence the determination by the four methods, and the interference of phosphate ion could be eliminated.
Key words:  Soluble silicon  photocolorimetric method  1, 2, 4-trichlorobenzene amino phenol sulfonic acid reduction-silicon molybdenum blue method  glass container  interference of phosphate ion
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