Methods of Analysis of PCBs in Sediments, Water, and Biota
A solution of the 19 target congeners is used for a 5-point calibration. Tetrachloro-m-xylene is used as a surrogate to monitor recovery. MDL: The MDLs for congeners are not provided in the method but are assumed similar to the National Oceanic and Atmospheric Administration (NOAA) method and the U.S. Army Corps of Engineers (USAGE) New York
Determination of organochlorine pesticides in ground water …
2002年7月26日 · Samples are initially fortified with 2,4,5,6-tetrachloro-m-xylene (surrogate) and decachlorobiphenyl (retention time marker), then extracted with a 30-μm thickness polydimethylsiloxane solid-phase microextraction fiber. The analytes collected are thermally desorbed in a heated gas chromatographic inlet, separated using independent fused-silica ...
3.1 Were the recoveries of tetrachloro-m-xylene (TCMX) and decachlorobiphenyl (DCB) presented on CLP Surrogate Recovery Summary forms (Form II), or equivalent, for each of the following matrices?
Evaluating bottle liquid-liquid extraction technique for monitoring ...
2024年5月15日 · For recovering 21 organochlorine pesticides and two extraction surrogates (tetrachloro-m-xylene – TCMX and dibutyl chlorendate – DBC; Table 1), BLLE, a low cost and a low maintenance technique requiring only 1-L amber bottles to act both as sampling containers and extractors promises to be a cheap substitute for CLLE when CLLE glassware ...
Method 608.3 Organochlorine Pesticides and PCBs by GC/HSD
Surrogate - A compound unlikely to be found in a sample, which is spiked into the sample in a known amount before extraction, and which is quantified with the same procedures used to quantify other sample components. The purpose of the surrogate is to monitor method performance with each sample.
Tetrachloro-m-xylene - Wikipedia
Tetrachloro-m-xylene (tetrachlorometaxylene, or TCMX) is the organochlorine compound with the formula C 6 Cl 4 (CH 3) 2. It is the chlorinated derivative of m-xylene in which the four aromatic hydrogen atoms are replaced by chlorine. It is prepared by ferric chloride-catalyzed reaction of the xylene with chlorine. [1]
Determination of organochlorine pesticides in ground water
2002年7月26日 · A rapid, sensitive, convenient, and highly quality-assured method is presented for the determination of 19 organochlorine pesticides (OCPs) in small samples (10 ml) of ground water. Samples are initially fortified with 2,4,5,6-tetrachloro-m-xylene (surrogate) and decachlorobiphenyl (retention time m …
Pesticide Surrogate Mix, 200 µg/mL, Acetone, 200 µg/mL ... - Restek
Access your CofA online at www.restek.com/documentation. Enter Serial Number to view COA / COO & Data packs. Catalog No. 32000. Looking for a custom reference standard? Use this form to request a custom quote.
A reproducible concentration of surrogate compounds 2,4,5,6-te-trachloro-m-xylene (TCMX) and decachlorobiphenyl (DCB), is necessary to obtain accurate data of the testing compounds, Aroclor 1016 and Aroclor 1260. When performing concentrations in compliance with US EPA 8082 it is important to comply with the
Each sample was spiked with the surrogate compounds, tetrachloroxylene and decachlorobiphenyl, at approximately 0.1 mg/Kg. The results for the surrogate recoveries are reported out with each sample. One sample, D550(3-6), was spiked as a matrix spike (MS) and a matrix spike duplicate (MSB) with Aroclor 1260 at approximately 0.6 mg/Kg.