ISO 23646:2022 pdf download – Soil quality — Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron- capture detection (GC-ECD).
The limit of detection and the limit of application depends on the determinants, the sample intake, the equipment used, the quality of chemicals used for the extraction of the sample and the clean-up of the extract. Under the conditions specified in this document, lower limits of application from 1 μg/kg (expressed as dry matter) for soils to 10 μg/kg (expressed as dry matter) for sediments can be achieved. The necessity to achieve these lower limits of application depends on the analyses order and the current limit values. Soils and sediments can differ in properties as well as in the expected contamination levels of OCPs and the presence of interfering substances. These differences make it impossible to describe one general procedure. Based on the properties of the samples, this document contains decision tables regarding drying-, extraction- and clean-up procedures. This method is performance based. The method can be modified if all performance criteria given in this method are met. The method can be applied to the analysis of other chlorinated compounds not specified in the scope in cases where suitability has been proven by proper in-house validation experiments. NOTE The validation data are shown in Annex A . This document is validated only for α-HCH, β-HCH, γ-HCH, δ-HCH, o,p′-DDE, p,p′-DDE, o,p′-DDD, p,p′-DDD, o,p′-DDT and p,p′-DDT. For sediments, data are displayed measured using an ECD detection. The comparability of ECD and MS data in terms of the approach of this document was demonstrated on additional matrices. 2 Normative references 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. ISO 5667-15, Water quality — Sampling — Part 15: Guidance on the preservation and handling of sludge and sediment samples ISO 8466-1, Water quality — Calibration and evaluation of analytical methods — Part 1: Linear calibration function ISO 11465, Soil quality — Determination of dry matter and water content on a mass basis — Gravimetric method ISO 14507, Soil quality — Pretreatment of samples for determination of organic contaminants ISO 18512, Soil quality — Guidance on long and short term storage of soil samples ISO 22892, Soil quality — Guidelines for the identification of target compounds by gas chromatography and mass spectrometry EN 16179, Sludge, treated biowaste and soil — Guidance for sample pretreatment 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
ISO 23646:2022 pdf download – Soil quality — Determination of organochlorine pesticides by gas chromatography with mass selective detection (GC-MS) and gas chromatography with electron- capture detection (GC-ECD)
