碲化鎘量子點用于基質輔助激光解吸電離飛行時間質譜分析全氟化合物
發(fā)布時間：2018-12-18 19:58
【摘要】：考察了CdTe量子點作為新型無機基質,應用于基質輔助激光解吸電離飛行時間質譜(MALDI-TOFMS)法分析全氟辛烷磺酸(PFOS),全氟癸烷磺酸(PFDS),全氟己烷磺酸(PFHx S)和全氟庚烷磺酸(PFHp S)4種全氟化合物(PFCs)的效果;同時與傳統(tǒng)有機基質α-氰基-4-羥基桂皮酸(CHCA)、1,8-雙二甲氨基萘(DMAN)進行比較。實驗中,分別將目標分析物與基質溶液滴于樣品板上并混合均勻,待自然蒸干溶劑后形成結晶狀,采用337 nm波長紫外激光輻照激發(fā),在負離子模式條件下MALDI-TOF-MS分析檢測。此外,簡要探討了CdTe量子點顆粒激光輔助解吸離子化的機理。結果表明,Cd Te量子點顆粒,具有較強紫外吸收,可直接作為無機基質用于以上4種全氟化合物的MALDI-TOF-MS分析,并且具有提高待測物質譜峰強度等特點。
[Abstract]:As a new inorganic matrix, CdTe quantum dots were applied to the analysis of perfluorooctane sulfonic acid (PFOS),) -perfluorodecane sulfonic acid (PFDS),) by matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOFMS). Effects of four perfluorinated compounds, (PFHx S) and (PFHp S), on perfluorinated hexane sulfonic acid (PFHx S) and perfluoroheptane sulfonic acid (PFHp S); At the same time, it was compared with the traditional organic matrix 偽 -cyano-4-hydroxycinnamic acid (CHCA), _ (1) -8 dimethylaminonaphthalene (DMAN). In the experiment, the target analyte and the matrix solution were dripped on the sample plate and mixed evenly, and the crystal was formed after the natural evaporating solvent, excited by UV laser at 337 nm wavelength, and detected by MALDI-TOF-MS analysis under the condition of negative ion mode. In addition, the mechanism of laser assisted desorption ionization of CdTe quantum dot particles is briefly discussed. The results show that, Cd Te QDs have strong UV absorption and can be directly used as inorganic matrix for the MALDI-TOF-MS analysis of the above four perfluorocarbons and have the characteristics of increasing the peak intensity of the substances to be measured.
【作者單位】： 中國農業(yè)科學院農業(yè)質量標準與檢測技術研究所農產品質量與食物安全重點開放實驗室;
【分類號】：O614.242;O657.63
[Abstract]:As a new inorganic matrix, CdTe quantum dots were applied to the analysis of perfluorooctane sulfonic acid (PFOS),) -perfluorodecane sulfonic acid (PFDS),) by matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOFMS). Effects of four perfluorinated compounds, (PFHx S) and (PFHp S), on perfluorinated hexane sulfonic acid (PFHx S) and perfluoroheptane sulfonic acid (PFHp S); At the same time, it was compared with the traditional organic matrix 偽 -cyano-4-hydroxycinnamic acid (CHCA), _ (1) -8 dimethylaminonaphthalene (DMAN). In the experiment, the target analyte and the matrix solution were dripped on the sample plate and mixed evenly, and the crystal was formed after the natural evaporating solvent, excited by UV laser at 337 nm wavelength, and detected by MALDI-TOF-MS analysis under the condition of negative ion mode. In addition, the mechanism of laser assisted desorption ionization of CdTe quantum dot particles is briefly discussed. The results show that, Cd Te QDs have strong UV absorption and can be directly used as inorganic matrix for the MALDI-TOF-MS analysis of the above four perfluorocarbons and have the characteristics of increasing the peak intensity of the substances to be measured.
【作者單位】： 中國農業(yè)科學院農業(yè)質量標準與檢測技術研究所農產品質量與食物安全重點開放實驗室;
【分類號】：O614.242;O657.63
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