Humic substances halogens

Almost all classes of compounds non-selective Flame ionization detector Non-halogenated volatile compounds (EPA 8015) Phenols (EPA 8041) PAHs (EPA 8100) —All other chemical compounds present in the sample will interfere with the target analytes. —TPH analyses are affected by naturally occurring organic compounds in soils with high humic substance content. 

Asplund G., Grimvall A., and Petterson C. (1989) Naturally produced organic halogens (AOX) in humic substances from soil and water. Sci. Tot Environ. 81/82, 239-248. 

Combustion of the sample in an oxygen combustion flask (Alcino et al., 1965) followed by ion chromatography is an attractive method for the analysis of sulfur in humic substances. Not only does the method require relatively little sample and provide high sensitivity, but it also allows simultaneous determination of halogens. One must be sure that sulfur is not rendered insoluble by ash constituents such as calcium. 

Organic matter and halogens are present in most aquifers in Denmark and the majority of organic matter is aquatic humic substances. Iodine-containing humic substances, and free iodine coexist in drinking water in Denmark. 

Elemental analysis includes carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, halogen, and elemental ratios C/H, 0/C, and C/N. Typical elemental composition of water and soil humic substances are shown in Table 1. Carbon is the major element and it... 

The photobehavior of phenylurea herbicides in aqueous solution depends on ring snbstitntion. For nonhalogenated derivatives, the main reaction is PFR (Scheme 31.22), wha-eas in the case of halogenated phenylureas, photohydrolysis prevails. Photocatalytic oxidation can be induced by TiO, iron salts, or humic substances [187,188]. 

Radlinger, G. and Heumann, K. G. (1997) Determination of halogen species of humic substances using HPLC/ICP-MS coupling. Fresenius J. Anal. Chem., 359,430-3. 

T HE PRESENCE OF ORGANIC CONSTITUENTS IN DRINKING WATER has been known for many years because these substances were found to influence the taste, color, and odor of drinking waters (J). The organic constituents consist of compounds of both natural and industrial origin. The natural ones compose the major portion and include mainly undefined fulvic and humic acids (2). For the industrial ones, most attention has been paid so far to the volatile nonpolar compounds. In part, this situation is due to analytical (technical) restrictions and to the growing awareness (3, 4) that volatile halogenated hydrocarbons are introduced as a result of a chlorine treatment. 

Humans consume and pollute large quantities of water. Chapter 6 through Chapter 26 cover injurious or toxic substances of domestic, agricultural, and industrial sources halogens, sulphur compounds, phosphates, cyanides, asbestos, heavy and other metals, silicon compounds, nitrogen compounds, organic acids, phenolic substances, humic matter, pesticides, insecticides, herbicides, fimgicides, PCBs, PCDFs, PCDDs, PAHs, VOCs, surfactants, EDCs, and plastics residues. 

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