Cyanazine water

FIG. 7 Analysis of RDC data for the partition kinetics of cyanazine between octanol and water. 

Of the 22 pesticides analyzed in water, 21 were found to be present in some or all of the samples analyzed cyanazine was the only undetected compound. Figure 2 shows the concentration of individual and total pesticides and their frequency of detection in the water samples collected from each of the six sampling sites monitored. 

Lawruk, T.S., C.E. Lachman, S.W. Jourdan, J.R. Fleeker, D.P. Herzog, and F.M. Rubio. (1993). Quantification of cyanazine in water and soil by a magnetic particle-based ELISA../. Agric. Food Chem., 41 747-752. 

Nash, R.G (1990). Solid-phase extraction of carbofuran, atrazine, simazine, alachlor, and cyanazine from shallow well water. J. Assoc. Off. Anal. Chem., 13 438 142. 

Nelson, H. and R.D. Jones (1994). Potential regulatory problems associated with atrazine, cyanazine, and alachlor in surface water source drinking water. Weed. Technol., 8 852-861. 

Steinheimer, T.R. and K.D. Scoggin (2001). Fate and movement of atrazine, cyanazine, metolachlor and selected degradation products in water resources of the deep Loess Hills of southwestern Iowa, USA. J. Environ. Monit., 3 126-132. 

There are limited monitoring data for cyanazine and propazine from CWS with groundwater and surface water sources. USEPA (1989a) has established lifetime HALs of 1.0 and lO.Oppb for cyanazine and propazine, respectively. 

Figure 30.8 Concentrations of atrazine and cyanazine in water samples selected from reservoirs of midwestem United States during 1992 and 1993.

This section discusses the occurrence of the degradation products of atrazine, cyanazine, simazine, propazine, prom-etryn, and prometon, as well as their degradation pathways from soil into surface water. More detailed discussion of triazine degradation can be found in several other chapters of this book. 

An important finding of USGS research was the occurrence of triazine herbicides in surface water. In a study by Thurman et al. (1991, 1994) measurable amounts of atrazine, the most frequently detected herbicide, occurred in 91% of the pre-planting samples, 98% of the post-planting samples, and 76% of the harvest samples. The atrazine degradation product DEA was found in many of the samples that contained atrazine. The frequency of detection or apparent order of stability of the herbicides and their degradation products is as follows atrazine, DEA, DIA, and cyanazine. This stability order is based on results of field-dissipation studies on atrazine and cyanazine (Meyer, 1994 Mills and Thurman, 1994). 

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