量子点增敏碱性鲁米诺-高碘酸钾化学发光法测定五氯酚钠
Determination of Sodium Pentachlorophenate by Chemiluminescence of CdTe Quantum Dots Enhanced Luminol-Potassium Periodate System
摘 要
在强碱性介质中,CdTe量子点对鲁米诺-高碘酸钾化学发光体系具有强烈的增敏作用,加入五氯酚钠又会对CdTe量子点增敏后的鲁米诺-高碘酸钾体系的化学发光产生猝灭效应,据此建立了测定环境水样和黄土中五氯酚钠含量的流动注射-化学发光法。考察了试剂浓度和泵速等试验条件对分析结果的影响。在最佳条件下,化学发光强度的改变值与五氯酚钠的质量浓度在8.0×10-5~1.0×10-3g·L-1范围内呈线性关系,检出限(3σ)为6.5×10-5g·L-1。将该法用于水样、黄土样中五氯酚钠的检测,加标回收率在95.0%~103%之间,测定值的相对标准偏差(n=5)在0.58%~2.9%之间。
流动注射
量子点
鲁米诺
高碘酸钾
五氯酚钠
Chemiluminescence
Flow injection
Quantum dots
Luminol
KIO4
Sodium pentachlorophenate
Abstract
A method of chemiluminescence coupled with flow injection was proposed for the determination of sodium pentachlorophenate (PCP-Na) in water and loess, based on the inhibition effect of PCP-Na on the chemiluminescence of the CdTe quantum dots-luminol-KIO4 system in alkaline medium, in which CdTe quantum dots showed a strong enhancement effect on the chemiluminescence of luminol-KIO4 system. The effects of experimental conditions were investigated. Under the optimized conditions, linear relationship was found between the changes of the chemiluminescence intensity and the mass concentration of PCP-Na in the range of 8.0×10-5~1.0×10-3g·L-1 with detection limit (3σ) of 6.5×10-5g·L-1. The method was applied to determine PCP-Na in water and soil samples, giving recovery rates measured by standard addition method in the range of 95.0%-103% and RSD (n=5) in the range of 0.58%-2.9%.
中图分类号 O657.32
所属栏目 试验与研究
基金项目 国家自然科学基金地区基金(21167015)
收稿日期 2014/5/4
修改稿日期
网络出版日期
作者单位点击查看
备注周敏(1978-),女,甘肃兰州人,副教授,博士,研究方向为环境分析和发光分析。
引用该论文: ZHOU Min,WU Xiao-ling,LI Cong,MA Yong-jun,WANG Ai-lian,MU Ai-ping. Determination of Sodium Pentachlorophenate by Chemiluminescence of CdTe Quantum Dots Enhanced Luminol-Potassium Periodate System[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2015, 51(4): 436～439
周敏,吴小玲,李聪,马永钧,王爱连,母爱萍. 量子点增敏碱性鲁米诺-高碘酸钾化学发光法测定五氯酚钠[J]. 理化检验－化学分册, 2015, 51(4): 436～439
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参考文献
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【3】杨静,袁玲,唐毅.利用隆线溞趋光行为检测水体中五氯酚钠和镉的研究［J］.环境科学学报, 2006,26(6):1011-1015.
【4】MORAIS P, STOICHEV T, BASTO M C P, et al. Pentachlorophenol toxicity to a mixture of microcystis aeruginosa and chlorella vulgaris cultures［J］. Aquatic Toxicology, 2014,150:159-164.
【5】李荣,甘金华,徐进,等.气相色谱-电子捕获法直接测定水体中的五氯酚钠［J］.中国环境监测, 2012,28(1):44-46.
【6】梁倩,朱晓华,王凯,等.水产品中五氯苯酚及其钠盐含量的气相色谱内标测定法［J］.水产学报, 2012,36(5):779-785.
【7】王虹,李跃红.HPLC法测定柞木中的五氯酚钠［J］.中国食品卫生杂志, 1997,9(2):13-14.
【8】裘淑华.藏红花红比色法测定水中五氯酚钠的改进［J］.浙江预防医学, 2000(5):70-70.
【9】AWAWDEH A M, HARMON H J. Spectrophotometric detection of pentachlorophenol (PCP) in water using immobilized and water-soluble porphyrins［J］. Biosensors and Bioelectronics, 2005,20(8):1595-1601.
【10】FLETCHER P, ANDREW K N, CALOKERINOS A C, et al. Analytical applications of flow injection with chemiluminescence detection-a review［J］. Luminescence, 2014,16(1):1-23.
【11】付小宁,陈改荣,范顺利.流动注射-抑制化学发光法测定多氯酚［J］.理化检验-化学分册, 2009,45(11):1282-1284.
【12】MURPHY C J. Peer reviewed: optical sensing with quantum dots［J］. Anal Chem, 2002,74(19):520-526.
【13】李巍,刘峥,赖丽艳,等.荧光量子点的制备和分析应用［J］.理化检验-化学分册, 2014,50(4):518-524.
【14】徐海娥,闫翠娥.水溶性量子点的制备及应用［J］.化学进展, 2005,17(5):800-808.
【15】李聪,吴小玲,张彩霞,等.CdTe量子点增敏碱性鲁米诺-高碘酸钾流动注射化学发光法测定对乙酰氨基酚［J］.分析试验室, 2014,33(2):129-132.
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