Extraction and clean-up methods for improvement of the chromatographic determination of polychlorinated biphenyls in sewage sludge-amended soils: elimination of lipids and sulphur

1996 ◽  
Vol 719 (1) ◽  
pp. 121-130 ◽  
Author(s):  
I. Folch ◽  
M.T. Vaquero ◽  
L. Comellas ◽  
F. Broto-Puig
Keyword(s):  
Sewage Sludge ◽  
Polychlorinated Biphenyls ◽  
Chromatographic Determination ◽  
Amended Soils

Behavior of Chlorinated Naphthalenes in Analytical Methods for Organochlorine Pesticides and Polychlorinated Biphenyls

1971 ◽  
Vol 54 (1) ◽  
pp. 175-177
Author(s):  
Judith A Armour ◽  
Jerry A Burke
Keyword(s):  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Analytical Methods ◽  
Chromatographic Method ◽  
Silicic Acid Column ◽  
Chromatographic Determination ◽  
Industrial Chemicals ◽  
Organochlorine Pesticide Residues ◽  
Column Chromatographic

Abstract Chlorinated naphthalenes are industrial chemicals with properties similar to those of polychlorinated biphenyls (PCB); they are recovered from foods by analytical methods for multiple residues of organochlorine pesticides. The chlorinated naphthalenes may interfere with the gas chromatographic determination of several organochlorine pesticides. A silicic acid column chromatographic method previously developed to separate PCB from organochlorine pesticide residues, particulary DDT and its analogs, also separates chlorinated naphthalenes from the pesticides and permits GLC determination without interference.

Evaluation of Potential Analytical Approach for Determination of Polychlorinated Biphenyls in Serum: Interlaboratory Study

1983 ◽  
Vol 66 (4) ◽  
pp. 956-968
Author(s):  
Virlyn W Burse ◽  
Larry L Needham ◽  
Chester R Lapeza ◽  
Margaret P Korver ◽  
John A Liddle ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Ethyl Ether ◽  
Analytical Approach ◽  
Chromatographic Determination ◽  
Electron Capture Detection ◽  
Coefficients Of Variation ◽  
The Mean

Abstract Forty-four laboratories participated in evaluation of a method for determining polychlorinated biphenyls (PCBs) as AR 1254 in serum at the parts per billion level. The method involves deproteinating serum with methanol, extracting with hexane-ethyl ether, and eluting PCBs from deactivated silica gel for gasliquid chromatographic determination with electron capture detection. Compounds are quantitated by using the Webb-McCall factors. Five serum pools, 4 containing in vivo-fortified PCBs (as AR 1254) or 8 in vitro-f ortif ied chlorinated hydrocarbons (CHs), or both, were used. For PCB fortification levels of 9.89 (EP 2), 24.74 (EP 3), and 74.20 ppb (EP 4), interlaboratory coefficients of variation (CVs) for collaborators that adhered to protocol were 92.7, 67.6, and 25.8%, respectively. CVs on the same pools analyzed by the Centers for Disease Control (CDC) were 7.4, 7.8, and 4.6%, respectively. Average interlaboratory recoveries for pools EP 2, EP 3, and EP 4 were 138.1,111.2, and 91.1%, respectively, and 99.8,89.6, and 90.4%, respectively, for CDC on the same pools. There was a general decrease in the mean error for those laboratories that had participated in an earlier study in which they were allowed to use their own methods.

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