Over the past century industries have discharged considerable quantities of gas containing SVOC into the environment. As a result, elevated levels of these compounds are found, not only locally, but at distant locations due to long range transport.
ALS environmental offers a full range of accredited analytical procedures for stationary source emissions based on US EPA, ISO or EN methodologies. Our laboratories will also provide the appropriate sampling media and solutions.
The analytical procedure follows international standards and methods.
|AIR TOXIC SERVICES|
|Dioxins (PCDD/F)||EN 1948,2-3; US EPA 23; US EPA TO9A|
|PCB||EN 1948,4; JIS K 0311|
|PAH||US EPA 429; ISO 11338|
|PBDE||Modified US EPA 1614|
|Phenol||EN ISO 14402|
POLYCHLORINATED DIBENZO-P-DIOXINS AND POLYCHLORINATED DIBENZOFURANS (PCDD/F)
Samples are collected through a PUF or XAD trap module, sometimes with liquid impingers (glycols). The sorbent (XAD-2 or PUF, glycol) is then extracted by organic solvents, precleaned by multiplied column chromatographies, and the final extract is analysed by HRGC-HRMS. The method is optimized for the 17 most toxic PCDD/F congeners and for chlorohomologue groups from tetra- to octa- CDDs and CDFs (All 210 chlorinated dioxins and furans).
POLYCHLORINATED BIPHENYLS (PCB)
Samples are collected through PUF or XAD trap module. The sorbent (XAD-2 or PUF) is then extracted by organic solvents, precleaned by multiplied column chromatographies, and the final extract is analysed by HRGC-HRMS. The method is optimised for indicator PCBs (PCB-7), coplanar PCBs (dioxin-like PCBs) and for chlorohomologue groups from mono- to deca- chlorinated biphenyls (All 209 PCBs).
POLYAROMATIC HYDROCARBONS (PAH)
Samples are collected through PUF or XAD trap module. The sorbent (XAD-2 or PUF) is then extracted by organic solvents, pre-cleaned by multiplied column chromatographies, and the final extract is analysed by HPLC or by HRGC-HRMS.
PHENOL FROM STATIONARY SOURCES
Samples are collected by bubbling air through a sodium carbonates (Na2CO3) solution. Samples are analysed by photometry by reaction with 4-aminoantipyrine.
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