CTMAB增敏共振瑞利散射法快速测定面制食品中的Pb

doi:10.7506/spkx1002-6630-201620031

食品科学 ›› 2016, Vol. 37 ›› Issue (20): 183-186.doi: 10.7506/spkx1002-6630-201620031

CTMAB增敏共振瑞利散射法快速测定面制食品中的Pb

庞向东，江虹，廖重梅，石文兵，秦艾

长江师范学院化学化工学院，重庆市无机特种功能材料重点实验室，重庆 408100

收稿日期:2016-10-27 修回日期:2016-10-27 出版日期:2016-10-25 发布日期:2016-12-01
通讯作者: 江虹
基金资助:
重庆市教委科技基金项目（KJ1401226）；长江师范学院科技基金项目（2015CXX079）；
国家自然科学基金面上项目（21275021）

Fast Determination of Lead in Flour Foods by Resonance Rayleigh Scattering Method with Cetyltrimethyl Ammonium Bromide (CTMAB) as Sensitizer

PANG Xiangdong, JIANG Hong, LIAO Chongmei, SHI Wenbing, QIN Ai

Chongqing Key Laboratory of Inorganic Special Functional Materials, School of Chemistry and Chemical Engineering,
Yangtze Normal University, Chongqing 408100, China

Received:2016-10-27 Revised:2016-10-27 Online:2016-10-25 Published:2016-12-01
Contact: JIANG Hong

摘要/Abstract

摘要：

在表面活性剂溴化十六烷基三甲基铵及酸性三羟甲基氨基甲烷-盐酸缓冲介质存在条件下，铬天青S与Pb（Ⅱ）结合，导致共振瑞利散射（resonance Rayleigh scattering，RRS）显著增强，并产生新的RRS光谱。在最大共振瑞利散射峰369 nm波长处，Pb（Ⅱ）的质量浓度在0.002～0.35 mg/L范围内与体系的共振瑞利散射增强程度（ΔIRRS）呈良好的线性关系，定量限为0.024 mg/kg。据此建立了快速、准确、高灵敏的测定Pb（Ⅱ）的RRS新方法，并研究了适宜的反应条件及RRS光谱特征。方法可用于市售面制食品中Pb的快速测定。

关键词: 溴化十六烷基三甲基铵, 铬天青S, Pb, 面制食品, 共振瑞利散射

Abstract:

In the presence of surfactant cetyl trimethyl ammonium bromide and an acidic Tris-hydrochloric acid buffer medium,
chrome azurol S can be bound with lead (Ⅱ) to form a new product, which leads to a distinctly enhanced resonance Rayleigh
scattering (RRS) and the appearance of a new RRS spectrum. The maximum RRS peak was located at 369 nm. The mass
concentration of lead (Ⅱ) in the range of 0.002 to 0.35 mg/L was directly proportional to the RRS intensity (ΔIRRS) of
system with the limit of quantitation (LOQ) being 0.024 mg/kg. Therefore, a rapid, accurate and sensitive new RRS method
for quantifying lead (Ⅱ) was successfully developed. The optimal reaction conditions and resonance Rayleigh scattering
spectral characteristics were investigated. The method can be used for rapid determination of lead in commercial pastas.

Key words: cetyl trimethyl ammonium bromide, chrome azurol S, lead, flour foods, resonance Rayleigh scattering

中图分类号:

O657.39

庞向东，江虹，廖重梅，石文兵，秦艾. CTMAB增敏共振瑞利散射法快速测定面制食品中的Pb[J]. 食品科学, 2016, 37(20): 183-186.

PANG Xiangdong, JIANG Hong, LIAO Chongmei, SHI Wenbing, QIN Ai. Fast Determination of Lead in Flour Foods by Resonance Rayleigh Scattering Method with Cetyltrimethyl Ammonium Bromide (CTMAB) as Sensitizer[J]. FOOD SCIENCE, 2016, 37(20): 183-186.

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CTMAB增敏共振瑞利散射法快速测定面制食品中的Pb

Fast Determination of Lead in Flour Foods by Resonance Rayleigh Scattering Method with Cetyltrimethyl Ammonium Bromide (CTMAB) as Sensitizer

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