碲化镉量子点用于基质辅助激光解吸电离飞行时间质谱分析全氟化合物

引用本文: 杨梦瑞, 王敏, 周剑, 汤晓艳, 毛雪飞, 王彤彤. 碲化镉量子点用于基质辅助激光解吸电离飞行时间质谱分析全氟化合物[J]. 分析化学, 2016, 44(2): 315-318. doi: 10.11895/j.issn.0253-3820.150623 shu

Citation: YANG Meng-Rui, WANG Min, ZHOU Jian, TANG Xiao-Yan, MAO Xue-Fei, WANG Tong-Tong. Cadmium Telluride Quantum Dots as Matrix for MALDI-TOF-MS Analysis of Perfluorinated Compounds[J]. Chinese Journal of Analytical Chemistry, 2016, 44(2): 315-318. doi: 10.11895/j.issn.0253-3820.150623 shu

碲化镉量子点用于基质辅助激光解吸电离飞行时间质谱分析全氟化合物

1.
中国农业科学院农业质量标准与检测技术研究所, 农产品质量与食物安全重点开放实验室, 北京 100081

通讯作者: 王敏

摘要: 考察了CdTe量子点作为新型无机基质, 应用于基质辅助激光解吸电离飞行时间质谱(MALDI-TOF-MS)法分析全氟辛烷磺酸(PFOS), 全氟癸烷磺酸(PFDS), 全氟己烷磺酸(PFHxS)和全氟庚烷磺酸(PFHpS)4种全氟化合物(PFCs)的效果;同时与传统有机基质α-氰基-4-羟基桂皮酸(CHCA)、1, 8-双二甲氨基萘(DMAN)进行比较。实验中, 分别将目标分析物与基质溶液滴于样品板上并混合均匀, 待自然蒸干溶剂后形成结晶状, 采用337 nm波长紫外激光辐照激发, 在负离子模式条件下MALDI-TOF-MS分析检测。此外, 简要探讨了CdTe量子点颗粒激光辅助解吸离子化的机理。结果表明, CdTe量子点颗粒, 具有较强紫外吸收, 可直接作为无机基质用于以上4种全氟化合物的MALDI-TOF-MS分析, 并且具有提高待测物质谱峰强度等特点。

关键词:

English

Cadmium Telluride Quantum Dots as Matrix for MALDI-TOF-MS Analysis of Perfluorinated Compounds

1.
Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agriculture, Beijing 100081, China

Corresponding author: 王敏

Received Date: 05 August 2015

Abstract: Cadmium telluride quantum dots (CdTe QDs) as a novel inorganic matrix were applied in matrix assisted laser desorption ionization time-of-flight mass spectrometric (MALDI-TOF-MS) analysis of perfluorinated compounds including perfluorooctane sulfonate (PFOS), perfluorodecane sulfonate (PFDS), perfluorohexane sulfonate (PFHxS) and perfluoroheptane sulfonate (PFHpS), and its performance was investigated and compared with conventional organic matrix involving α-cyano-4-hydroxycinnamic acid (CHCA) and 1,8-bis(dimethylamino)naphthalene (DMAN) under the same mass spectrometric conditions. In the experiment, the analytes and matrix were mixed on the sample plate. The crystal of analyte and matrix was excited by using 337-nm laser after the solvent was evaporated, and was detected under negative ion mode of MALDI-TOF-MS. The results demonstrated that CdTe QDs with high UV absorption could be an efficient inorganic matrix for enhancement of peak intensity in MALDI-TOF-MS analysis of perfluorinated compounds. Additionally, mechanism of ionization process was briefly discussed.

Key words:

Cadmium telluride quantum dots
/ Matrix assisted laser desorption ionization time-of-flight mass spectrometry
/ Perfluorinated compounds

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

碲化镉量子点用于基质辅助激光解吸电离飞行时间质谱分析全氟化合物

通讯作者: 王敏

English

Cadmium Telluride Quantum Dots as Matrix for MALDI-TOF-MS Analysis of Perfluorinated Compounds

Corresponding author: 王敏

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

碲化镉量子点用于基质辅助激光解吸电离飞行时间质谱分析全氟化合物

通讯作者: 王敏

English

Cadmium Telluride Quantum Dots as Matrix for MALDI-TOF-MS Analysis of Perfluorinated Compounds

Corresponding author: 王敏

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs