Concept: ALS_S_SMLGMS01 in the ANALYS_MET vocabulary

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Concept URI	https://kodlistor.miljodatasamverkan.se/def/vocabulary/DATA_MATVARDE/ANALYS_MET/ALS_S_SMLGMS01
Preferred label	ALS_S_SMLGMS01
Definition	ALS S-SMLGMS01 CZ_SOP_D06_03_181 (US EPA 429, US EPA 1668, US EPA 3550) - ALS analysmetod för bestämning av semivolatila organiska ämnen i jord, slam och sediment med isotoputspädning och gaskromatografi med masspektrometri. Summor beräknas från uppmätta värden. Metoden har modifierats inom omfattningen för den flexibla ackrediteringen angiven i Annex to the Certificate of Accreditation No . 468/2020 utfärdad 27 juli 2020. Parametrar som inte ingår i bilagan till ackrediteringscertifikatet i parameter översikten under index 27 har lagts till. "Determination of semi-volatile organic compounds by gas chromatography method with MS and calculation of semi-volatile organic compounds sums from measured values. The principle of the method is the microwave extraction of analytes from a sample of freeze-dried sea or river sediment into an organic solvent. The portion of the organic extract is concentrated and directly dosed into the gas chromatograph, where the analytes are separated on the chromatographic column and their detection is performed by a mass detector in the MRM (Multiple Reaction Monitoring) mode. Quantification is performed using the internal (extraction) standard method. The internal standard extraction method is classified according to EPA 8000C as a hybrid between the internal standard method and the isotopic dilution method. (http://www.epa.gov/osw/hazard/testmethods/pdfs/8000c_v3.pdf). An extraction (internal) standard is added into the freeze-dried philized sediment sample before extraction, which is otherwise commonly used as an internal standard added into extracts prior to injection into the gas chromatograph. These are either deuterated analogues of the target analytes, or substances very similar to the target analytes that do not occur in freeze dried sediment samples. These internal standards are also added in the same amount to the calibration solutions, and a calibration curve is constructed as a function of the ratio of the concentrations of the target analyte and the internal standard (x-axis) to the ratio of the responses of the target analyte and the internal standard (y-axis). The amount of analyte in the sample is calculated using the evaluation software MassHunter."
Notation
Status	Valid
Status Modified	2025-07-08
Accepted Date	2025-07-08
Not Accepted Date