Kelso, Washington Laboratory Method information displayed is provided for informational purposes only. No warranty express or implied is made as to the website accuracy, completeness, or applicability such as the age of a method and whether or not it applies to your project. Please contact us for assistance. EPA Method
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Kelso, Washington Laboratory Method information displayed is provided for informational purposes only. No warranty express or implied is made as to the website accuracy, completeness, or applicability such as the age of a method and whether or not it applies to your project.
Please contact us for assistance. EPA Method The analytes pesticides, herbicides, and organohalides are eluted from the LSE disk or cartridge with small volumes of ethyl acetate and methylene chloride, and this eluate is concentrated by evaporation of some of the solvent. The concentrations of analytes are determined using a fused silica capillary column gas chromatography GC system equipped with an electron capture detector ECD. Scope: This method determines 29 chlorinated pesticides, three herbicides, and four organohalides in drinking water, ground water, and drinking water in any treatment stage.
B Contamination from sample carryover: Rinsing apparatus replacing syringes and injection port liners as needed can minimize contamination. C Variable solvents: Use the same solvent for each analysis. QC Requirements: Initial demonstration of laboratory capability, followed by laboratory reagent blanks LRBs , laboratory fortified blanks LFBs , and laboratory fortified matrix samples.
Additional quality control practices are recommended. Initial demonstration of capability is demonstrated by analysis of a minimum of four replicate LFBs containing each analyte of concern at a suggested concentration in the range of 0.
A method detection limit MDL must also be determined for each analyte. Maximum Holding Time:.
EPA METHOD 508A PDF
Summary: A 1-L sample is placed into a separatory funnel and extracted with methylene chloride or one of several optional solvents. The extract is dried, concentrated, and the solvent is exchanged to chloroform. Scope: This method can be used to screen for polychlorinated biphenyls PCBs in finished drinking water, raw source water, or drinking water in any treatment stage. This procedure is applicable to samples containing PCBs as single congeners or as complex mixtures such as weathered, intact, or mixtures of commercial Aroclors. The procedure has only been evaluated using Aroclors and 2-chlorobiphenyl as a source of PCBs.
EPA Methods 500 Series
Digrel One of the methods Recap and shake vigorously by hand for 1 min. The gas will rapidly dissolve in the methanol. Esterify acids with diazomethane as described in Sect. This flexible approach should meet the needs and requirements of nearly all laboratories. PIand other suppliers. Lichtenberg and James E. Obtained in this way, the standard deviation includes normal day-to-day variations, and the MDL will be more realistic.