Standard Test Method for Determination of Diisopropyl Methylphosphonate, Ethyl Methylphosphonic Acid, Isopropyl Methylphosphonic Acid, Methylphosphonic Acid and Pinacolyl Methylphosphonic Acid in Soil by Pressurized Fluid Extraction and Analyzed by Liquid Chromatography/Tandem Mass Spectrometry
|Publication Date:||1 June 2016|
|ICS Code (Chemical characteristics of soils):||13.080.10|
This procedure covers the determination of Diisopropyl Methylphosphonate (DIMP), Ethyl Methylphosphonic Acid (EMPA), Isopropyl Methylphosphonic Acid (IMPA), Methylphosphonic Acid (MPA) and Pinacolyl Methylphosphonic Acid (PMPA), referred to collectively as organophosphonates (OPs) in this test method, in soil. This method is based upon solvent extraction of a soil by pressurized fluid extraction (PFE). The extract is filtered and analyzed by liquid chromatography/ tandem mass spectrometry (LC/MS/MS). OPs are qualitatively and quantitatively determined by this method.
Units-The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
The Method Detection Limit2 (MDL), electrospray ionization (ESI) mode and Reporting Range3 for the OPs are listed in Table 1.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2 The MDL is determined following the Code of Federal Regulations, 40 CFR Part 136, Appendix B utilizing solvent extraction of soil by PFE. A detailed process determining the MDL is explained in the reference and is beyond the scope of this Standard to be explained here.
3 Reporting range concentrations are calculated from Table 4 concentrations assuming a 100 μL injection of the lowest and highest level calibration standards with a 40 mL final extract volume of a 10 gram soil sample. Volume variations will change the reporting limit and ranges. The reporting limit (RL), lowest concentration of the reporting range, is calculated from the concentration of the Level 1 calibration standard as shown in Table 4.