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

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: WANG Min,
Received Date: 5 August 2015
Available Online: 11 November 2015

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.
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沈阳化工大学材料科学与工程学院沈阳 110142