01997nas a2200205   4500008004100000245016000041210006900201260000800270300001200278490000800290520120200298100001901500700001701519700002401536700002501560700002601585700002201611700003101633856012701664       2017                        eng d00aDetermination of triazines and triazoles in grapes using atmospheric pressure matrix-assisted laser desorption/ionization high-resolution mass spectrometry0 aDetermination of triazines and triazoles in grapes using atmosph  cMAY  a640-6460 v1003 aA chromatography-free atmospheric pressure matrix-assisted laser desorption/ionization high-resolution mass spectrometry (AP-MALDI HRMS) method is described for the simultaneous and quantitative detection of triazines and triazoles in grapes. The analytes were detected reproducibly with high mass accuracy (mass error within 5 ppm) and further confirmed by collision-induced dissociation fragmentation in tandem MS. The LODs and LOQs for all the analytes were found to be in the nanogram per gram level (15-20 ng/g LOQ). Internal standard normalized high-resolution accurate mass extracted (HR-AM) peak intensities of the detected ions were used to generate the concentration response curves. Linearity (with R-2 values around 0.99) was obtained for these curves within a concentration range of 20-200 ng/g of the individual analytes. The accuracy and precision of the method were further established using QC samples. Validation and performance comparison of the AP-MALDI HRMS method with an existing standard method using LC with :triple quadrupole MS was carried out (evaluating sensitivity, accuracy, precision, and analysis time) using 20 table-grape field samples after QuEChERS extraction.1 aMahale, Vishal1 aSingh, Ajeet1 aPhadke, Gayatri, S.1 aGhanate, Avinash, D.1 aOulkar, Dasharath, P.1 aBanerjee, Kaushik1 aPanchagnula, Venkateswarlu  uhttps://library.ncl.res.in/content/determination-triazines-and-triazoles-grapes-using-atmospheric-pressure-matrix-assisted