By Lawrence H. Keith
The preferred first variation of this publication contained nearly six hundred analyte/method summaries. This re-creation comprises two times as many new EPA-approved tools for trying out and examining business chemical substances, insecticides, herbicides, dioxins, and PCBs and is a published model of the EPA's Sampling and research tools Database.
Each analyte/method precis comprises the entire details required to face by myself as a reference. hence, as well as a quick precis of every process, descriptions comprise required instrumentation, interferences, sampling boxes, upkeep ideas, greatest conserving occasions, detection degrees, accuracy, precision, qc standards, EPA reference, and, while to be had, EPA contacts with cellphone numbers. each one summarized file is a "stand-alone" record.
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Wastes that are insoluble in methanol are diluted with reagent tetraglyme or possibly polyethylene glycol (PEG). An aliquot of the extract is added to organic-free reagent water containing surrogate and internal standards. This is purged at ambient temperature. 0 mg/kg should be analyzed by this method. Mix the contents of the sample container with a narrow metal spatula. For sediments or soils and solid wastes that are insoluble in methanol, weigh 4 g (wet weight) of sample into a tared 20-mL vial.
Sediments, soils, and waste samples — All samples of this type should be screened by GC analysis using a headspace method (EPA Method 3810) or the hexadecane extraction and screening method (EPA Method 3820). 005–1 mg/kg) or the high-concentration method (>1 mg/kg). Low-concentration method — The low-concentration method is based on purging a heated sediment or soil sample mixed with organic-free reagent water containing the surrogate and internal standards. Analyze all reagent blanks and standards under the same conditions as the samples.
The packed gas chromatographic columns recommended for the basic fraction may not exhibit sufficient resolution for some analytes. INSTR UMENTATION A GC/MS system with an injection port designed for on-column injection when using packed columns and for splitless injection when using capillary columns. D. glass, packed with 3% SP-2550 on Supelcoport (100/120 mesh) or equivalent. D. glass, packed with 1% SP-1240DA on Supelcoport (100/120 mesh) or equivalent. PRECISION & A CCURACY The MDL concentrations were obtained using reagent water.