Journal
FOOD ANALYTICAL METHODS
Volume 6, Issue 4, Pages 1162-1169Publisher
SPRINGER
DOI: 10.1007/s12161-012-9523-2
Keywords
Coconut water; Organophosphorus pesticides; Liquid chromatography; Mass spectrometry; Solid phase extraction
Categories
Funding
- Council of Scientific and Industrial Research, (CSIR) New Delhi, India
- [CNP-0815]
Ask authors/readers for more resources
A simple and specific analytical method based on solid phase extraction (SPE), and liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) operated in multipule reaction monitoring (MRM) mode with dynamic time segment acquisition windows, was developed to determine organophosphorus pesticide residues (acephate, monocrotophos, dimethoate, malaoxon, dichlorvos, malathion, phenthoate, parathion-ethyl, chlorfenvinfos, quinalphos, diazinon, phosalone, profenofos, ethion, chlorpyrifos) in tender coconut water. The method was observed to be linear with lower limit of detections ranged from 0.1 to 1.5 ng/mL (measured at S/N ratio 5:1) and limit of qunatitation 0.5 to 2.0 ng/mL (measured at S/N ratio 10:1) for all studied pesticides. The intra- and inter-day assay accuracies calculated at four concentration levels in six replicates (n = 6) were in the range of 80 % to 115 % with relative standard deviations (RSD) below 15 %. The percentage recoveries of all the analysed pesticides were in the range of 86.8 % to 107.6 % and the calculated RSD values were below 12 %. The developed method was applied to determine pesticide residues in natural tender coconut water samples. The results showed the presence of malathion ranging from 24 to 45 ng/L concentrations in some natural tender coconut water samples collected from various local market places in and around Hyderabad, Andhra Pradesh, India.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available