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eLibrary > BS ISO 23646:2022 Soil quality. Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD) >

BS ISO 23646:2022 Soil quality. Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD), 2022

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BS ISO 23646:2022 Soil quality. Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD), 2022

National foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Interferences [Go to Page]
5.1 Interference with sampling and extraction
5.2 Interference with GC
6 Safety remarks
7 Reagents [Go to Page]
7.1 General
7.2 Reagents for extraction
7.3 Reagents for clean-up [Go to Page]
7.3.1 Clean-up A using aluminium oxide
7.3.2 Clean-up B using silica gel 60 for column chromatography
7.3.3 Clean-up C using gel permeation chromatography (GPC)
7.3.4 Clean-up D using Florisil®
7.4 Reagents for gas chromatographic analysis
7.5 Standards [Go to Page]
7.5.1 General
7.5.2 Calibration standards
7.5.3 Internal, extraction and injection standards
7.6 Preparation of standard solutions [Go to Page]
7.6.1 Preparation of calibration standard solutions of OCPs
7.6.2 Preparation of internal standard solution
7.6.3 Preparation of injection standard solution
7.6.4 Preparation of solution for liner checking
8 Apparatus [Go to Page]
8.1 Extraction and clean-up procedure [Go to Page]
8.1.11 Quartz wool or silanized glass wool.
8.2 Gas chromatograph [Go to Page]
8.2.1 General
8.2.2 Capillary columns
9 Sample storage and pre-treatment [Go to Page]
9.1 Sample storage
9.2 Sample pretreatment
10 Procedure [Go to Page]
10.1 Blank test
10.2 Extraction [Go to Page]
10.2.1 General
10.2.2 Extraction procedure 1 — Agitation or sonication
10.2.3 Extraction procedure 2 — Pressurized liquid extraction (PLE)
10.2.4 Extraction procedure 3 — Soxhlet
10.3 Concentration
10.4 Clean-up of the extract [Go to Page]
10.4.1 General
10.4.2 Clean-up A — Aluminium oxide
10.4.3 Clean-up B — Silica gel
10.4.4 Clean-up C — Gel permeation chromatography
10.4.5 Clean-up D — Florisil® 2)
10.5 Addition of the injection standard
10.6 Gas chromatographic analysis (GC) [Go to Page]
10.6.1 General
10.6.2 Setting the gas chromatograph
10.7 Mass spectrometry (MS) [Go to Page]
10.7.1 Mass spectrometric conditions
10.7.2 Calibration of the method using an internal standard
10.7.3 Measurement
10.7.4 Identification
10.7.5 Check on method performance
10.7.6 Calculation
10.8 Electron capture detection (ECD) [Go to Page]
10.8.1 General
10.8.2 ECD conditions
10.8.3 Calibration of the method using an internal standard
10.8.4 Measurement
10.8.5 Identification
10.8.6 Check on ECD method performance
10.8.7 Calculation
11 Performance characteristics
12 Precision
13 Test reports
Annex A (informative) Repeatability and reproducibility data
Annex B (informative) Calibration strategy
Annex C (informative) Example of GC-MS/MS measurement conditions for OCPs
Bibliography [Go to Page]

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BS ISO 23646:2022 Soil quality. Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron-capture detection (GC-ECD), 2022

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