TAILIEUCHUNG - APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER: METHOD 605—BENZIDINES
Acetaldehyde, Acrylamide, Aflatoxin, Allyl isothiocyanate, Aniline, Benzaldehyde, Benzene, Benzo(a)pyrene, Benzofuran, Benzyl acetate, Caffeic acid, Catechol, Coumarin, 1,2,5,6-dibenz(a)anthracene, Estragole, Ethyl alcohol, Ethyl acrylate, Ethyl benzene, Ethyl carbamate, Furan and furan derivatives, Furfural, Heterocyclic amines, Hydrazines Hydrogen peroxide, Hydroquinone, d-limonene, 4-methylcatechol, Methyl eugenol, Psoralens, Quercetin glycosides, Safrole While this may seem frightening, the levels of these chemicals and pesticide residues found in food are too low to affect health. So what steps should be taken to prevent cancer? The World Health Organization and the American Cancer Society suggest that to reduce your risks of getting cancer you must avoid tobacco use, exercise regularly and eat a diet rich. | APPENDIX A TO PART 136 METHODS FOR ORGANIC CHEMICAL ANALYSIS OF MUNICIPAL AND INDUSTRIAL WASTEWATER METHOD 605 BENZIDINES 1. Scope and Application This method covers the determination of certain benzidines. The following parameters can be determined by this method Parameter Storet No. CAS No. Benzidine 39120 92-87-5 3 3 -Dichlorobenzidine 34631 91-94-1 This is a high performance liquid chromatography HPLC method applicable to the determination of the compounds listed above in municipal and industrial discharges as provided under 40 CFR Part . When this method is used to analyze unfamiliar samples for the compounds above identifications should be supported by at least one additional qualitative technique. This method describes electrochemical conditions at a second potential which can be used to confirm measurements made with this method. Method 625 provides gas chromatograph mass spectrometer GC MS conditions appropriate for the qualitative and quantitative confirmation of results for the parameters listed above using the extract produced by this method. The method detection limit MDL defined in Section 1 for each parameter is listed in Table 1. The MDL for a specific wastewater may differ from those listed depending upon the nature of the interferences in the sample matrix. Any modification of this method beyond those expressly permitted shall be considered as a major modification subject to application and approval of alternate test procedures under 40 CFR Parts and . This method is restricted to use by or under the supervision of analysts experienced in the use of HPLC instrumentation and in the interpretation of liquid chromatograms. Each analyst must demonstrate the ability to generate acceptable results with this method using the procedure described in Section . 2. Summary of Method A measured volume of sample approximately 1-L is extracted with chloroform using liquid-liquid extractions in a separatory funnel.
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