Determination of alkyl quaternary ammonium compounds by liquid chromatography with indirect photometric detection

1983 ◽  
Vol 55 (2) ◽  
pp. 393-396 ◽  
Author(s):  
J. R. Larson ◽  
C. D. Pfeiffer
Keyword(s):  
Liquid Chromatography ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Indirect Photometric Detection ◽  
Photometric Detection ◽  
Ammonium Compounds

Determination of selected quaternary ammonium compounds by liquid chromatography with mass spectrometry. Part II. Application to sediment and sludge samples in Austria

2007 ◽  
Vol 146 (2) ◽  
pp. 543-547 ◽  
Author(s):  
Elena Martínez-Carballo ◽  
Carmen González-Barreiro ◽  
Andrea Sitka ◽  
Norbert Kreuzinger ◽  
Sigrid Scharf ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Ammonium Compounds

Determination of selected quaternary ammonium compounds by liquid chromatography with mass spectrometry. Part I. Application to surface, waste and indirect discharge water samples in Austria

2007 ◽  
Vol 145 (2) ◽  
pp. 489-496 ◽  
Author(s):  
Elena Martínez-Carballo ◽  
Andrea Sitka ◽  
Carmen González-Barreiro ◽  
Norbert Kreuzinger ◽  
Maria Fürhacker ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Water Samples ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Discharge Water ◽  
Ammonium Compounds

Determination of quaternary ammonium compounds in food products by the method of ultra-performance liquid chromatography/high resolution mass-spectrometry

2020 ◽  
Vol 86 (8) ◽  
pp. 23-31
Author(s):  
V. G. Amelin ◽  
D. S. Bolshakov
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Quaternary Ammonium ◽  
High Resolution Mass Spectrometry ◽  
Food Products ◽  
Quaternary Ammonium Compounds ◽  
High Resolution Mass ◽  
Ammonium Compounds ◽  
Resolution Mass

The goal of the study is developing a methodology for determination of the residual amounts of quaternary ammonium compounds (QAC) in food products by UHPLC/high-resolution mass spectrometry after water-acetonitrile extraction of the determined components from the analyzed samples. The identification and determination of QAC was carried out on an «UltiMate 3000» ultra-high-performance liquid chromatograph (Thermo Scientific, USA) equipped with a «maXis 4G» high-resolution quadrupole-time-of-flight mass spectrometric detector and an ion spray «ionBooster» source (Bruker Daltonics, Germany). Samples of milk, cheese (upper cortical layer), dumplings, pork, chicken skin and ground beef were used as working samples. Optimal conditions are specified for chromatographic separation of the mixture of five QAC, two of them being a mixture of homologues with a linear structure (including isomeric forms). The identification of QAC is carried out by the retention time, exact mass of the ions, and coincidence of the mSigma isotopic distribution. The limits for QAC detection are 0.1 – 0.5 ng/ml, the determination limits are 1 ng/ml for aqueous standard solutions. The determinable content of QAC in food products ranges within 1 – 100 ng/g. The results of analysis revealed the residual amount of QAC present in all samples, which confirms data of numerous sources of information about active use of QAC-based disinfectants in the meat and dairy industry. The correctness of the obtained results is verified by introduction of the additives in food products at a level of 10 ng/g for each QAC. The relative standard deviation of the analysis results does not exceed 0.18. The duration of the analysis is 30 – 40 min.

Thin-film microextraction coupled to LC-ESI-MS/MS for determination of quaternary ammonium compounds in water samples

2013 ◽  
Vol 406 (2) ◽  
pp. 409-420 ◽  
Author(s):  
Ezel Boyacı ◽  
Chris Sparham ◽  
Janusz Pawliszyn
Keyword(s):  
Thin Film ◽  
Water Samples ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Compounds ◽  
Esi Ms ◽  
Ammonium Compounds
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