BS EN 17411:2020 pdf free.Fertilizers – Determination of perchlorate in mineral fertilizers by liquid chromatography and tandem mass spectrometry detection (LC-MS/MS].
BS EN 17411 This document specifies a method for the determination of traces of perchlorate by liquid chromatography and tandem mass spectrometry detection (LC-MS/MS]. The method is applicable to mineral fertilizers.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1482-2， Fertilizers and liming materials – 一Sampling and sample preparation 一 Part 2:  Sample preparation EN 12944-1, Fertilizers and liming materials and soil improvers一Vocabulary 一Part 1: General terms EN 12944-2, Fertilizers and liming materials and soil improvers一Vocabulary 一Part 2: Terms relating to fertilizers EN ISO 3696, Water for analytical laboratory use一Specification and test methods (ISO 3696).The perchlorate content of the fertilizer sample is determined by liquid chromatography with tandem mass spectrometry detection after water extraction. The sample is dissolved, filtered and directly analysed by LC-MS/MS. Quantification is performed using matrix calibration curve.The calibration curve is prepared in matrix to correct for matrix interferences. For the calibration solution, take 5 ml of acetonitrile and transfer quantitatively to a 10 ml volumetric flask ([6.3). Add an adequate volume of perchlorate standard solution (5.3) as given in Table 1 and bring to volume with the blank solution.7.3.2 Transfer the sample to a 250 ml volumetric flask (6.3) and add 150 ml 0,1 % acetic acid (5.4) to dissolve the sample. Bring to volume with 0,1 % acetic acid (5.4). Stir manually to homogenize (solution 1). 7.3.3 Take an aliquot of 25 ml of solution 1 and transfer quantitatively to a 50 ml volumetric flask (6.3). Add acetonitrile to the mark and stir manually to homogenize (solution 2). NOTE Solution 1 (sample diluted with 1 % acetic acid] is diluted with acetonitrile to obtain solution 2 (solution 2 = 25 ml solution 1 + 25 ml acetonitrile).BS EN 17411 pdf  download.