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- W2001525478 abstract "In this work a LC–MS/MS method for the determination of two quaternary ammonium growth regulators (chlormequat and mepiquat) in food is reported. The separation was based on hydrophilic interaction liquid chromatography (HILIC) without the use of ion-pair reagents. A gradient elution of acetonitrile and formic acid/ammonium formate buffer from 60 to 40% acetonitrile was enough to achieve a resolution >1.5 in less than 4.0 min. The HILIC system was coupled to a triple quadrupole mass spectrometer equipped with a heated electrospray probe (H-ESI) providing sub-pg LODs in SRM mode. A straightforward sample treatment (SPE C18 clean-up) was enough to provide MLODs at low ppb levels when analysing a range of food samples that covered different kinds of matrices such as fresh fruit, vegetables, fruit juices, baby food, bread, coffee and beer. Chlormequat was found in seven samples (0.8–126 ng/g) but mepiquat was only detected in bread and coffee samples (0.9–166 ng/g)." @default.
- W2001525478 created "2016-06-24" @default.
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- W2001525478 date "2009-05-01" @default.
- W2001525478 modified "2023-10-10" @default.
- W2001525478 title "Analysis of chlormequat and mepiquat by hydrophilic interaction chromatography coupled to tandem mass spectrometry in food samples" @default.
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- W2001525478 doi "https://doi.org/10.1016/j.chroma.2009.03.037" @default.
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