引用本文:	王兴国,张延青,李贤,孙国祥,王顺奎,于凯松,刘鹰.海水中臭氧总残留氧化物三种检测方法的比较研究[J].海洋科学,2015,39(12):21-27.

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海水中臭氧总残留氧化物三种检测方法的比较研究
王兴国^1,2, 张延青¹, 李贤^2,3, 孙国祥^2,3, 王顺奎⁴, 于凯松⁴, 刘鹰^2,3
1.青岛理工大学;2.中国科学院海洋研究所;3.海洋生态养殖国家地方联合工程实验室;4.山东东方海洋科技股份有限公司

摘要:

对臭氧总残留氧化物(TRO)常用3 种检测方法(碘化钾-N, N-二乙基-1, 4-苯二胺(KI-DPD)分光光度法、硼酸碘化钾(H3BO3-KI)比色法、靛蓝二磺酸钠(IDS)分光光度法)进行了比较研究。结果表明: 在0～0.5 mg/L 的TRO 浓度范围内, KI-DPD 分光光度法和H3BO3-KI 比色法线性关系良好, 检出限分别为0.040 mg/L 和0.034 mg/L, 并且这两种测定方法的准确性和重复性较佳, 相对标准偏差(RSD)均小于5.0%, 低于传统碘量法; 而IDS 分光光度法只有在高浓度臭氧海水样品(0.6～1.2 mg/L)检测时, RSD 才小于5.0%, 且测定浓度明显低于另外两种方法。故对于海水养殖水体中的TRO 检测, KI-DPD 分光光度法和H₃BO₃-KI 比色法均准确有效, 并且H₃BO₃-KI 比色法在检测操作上更为简便快捷。

关键词: 海水总残留氧化物 KI-DPD 分光光度法硼酸碘化钾比色法靛蓝二磺酸钠分光光度法

DOI：10.11759/hykx20150506002

分类号:

基金项目:国家自然科学基金项目(41306152, 31472312, 31402283); 农业部海洋渔业可持续发展重点实验室开放课题(2013-SDMFMA-KF-1);青岛市创新创业人才计划项目(3-CX-16)

A comparative study of three methods for detecting total residual oxidants in seawater

Abstract:

In this study, three relevant methods to detect total residual oxidants (TRO) in seawater were compared; the potassium iodide-N, N-diethyl-p-phenylene diamine (KI-DPD)spectrophotometric method, the boric acid potassium iodide (H₃BO₃-KI) colorimetry method, and the indigo disulfonic acid sodium (IDS)spectrophotometric method. The results showed that when TRO were in the range of 0～0.5mg/L, KI-DPD and H3BO3-KI presented good linear relationships and their detection limits were 0.040 mg/L and 0.034 mg/L, respectively. The relative standard deviation (RSD)of these two methods was <5.0%, which was less than the traditional iodine quantity method. However, the RSD of IDS was <5.0% only when the TRO concentration was in the rangeof 0.6～1.2mg/L. Furthermore, the corresponding IDS concentration was significantly lower thanthat in the other two methods. Therefore, for TRO detection in seawater, KI-DPD and H₃BO₃-KI are suggested. Moreover, H₃BO₃-KI is easier to operate.

Key words: seawater total residual oxidants KI-DPD spectrophotometry method H₃BO₃-KI colorimetric method indigo disulfonic acid sodium spectrophotometry method