Phosphorus-containing pesticides

U.S. EPA, Method SCI-Determination of Nitrogen- and Phosphorus Containing Pesticides in Ground Water hy GCj NPD, draft, Apr. 15, 1988 available from U.S. EPA Environmental Monitoring and Support Laboratory, Cincinnati, Ohio, 1988. 

Phosphorus-containing pesticides la 254 Phosphorus insecticides lb 83 Phosphorus pesticides lb 32 Photochemical activation lb 13 Photochemical reactions lb 15,17 Photodiodes la 24,29 Photo effect, external la 24 -, internal la 24, 29 Photo element la 24,29 Photography, exposure times la 137 -, instmmentation la 137 Photomultiplier la 25ff -, disadvantages la 27 -, energy distribution la 26 -, head on la 27 -, maximum sensitivity la 28 -, side on la 27 -, spectral sensitivity la 28 -, window material la 28 Photocells la 25 Phloxime lb 116... 

Cook AM, CG Daughton, M Alexander (1978) Phosphorus-containing pesticide breakdown products quantitative utilization as phosphorus sources by bacteria. Appl Environ Microbiol 36 668-672. 

Edgell KW, Jenkins EL, Lopez-Avila V, et al. 1991. Capillary column gas chromatography with nitrogen-phosphorus detection for determination of nitrogen- and phosphorus-containing pesticides in finished drinking waters Collaborative study. J Assoc Off Anal Chem 74 295-309. 

For the determination of nitrogen- and phosphorus-containing pesticides in water by extraction with dichloromethane and detection by GC-NPD... 

Determination of Nitrogen- and Phosphorus-Containing Pesticides in Water by GC with a Nitrogen-Phosphorus... 

Sharma, S.R., Singh, R.P., and Ahmed, S.R. Effect of different leachates on the movement of some phosphorus containing pesticides in soils using thin layer chromatography, Ecotoxicol. Environ. Sal, ll(2) 229-240, 1986. 

Group V has also been an area of interest, the mass spectrometry of phosphorus compounds having recently been reviewed (162). The mass spectra of phosphorus-containing pesticides have attracted interest... 

Choudhury, T.K., K.O. Gerhardt, and T.P. Mawhinney (1996). Solid-phase microextraction of nitrogen- and phosphorus-containing pesticides from water and gas chromatographic analysis. Environ. Sci. Technol., 30 3259-3266. 

Nitrogen and phosphorus containing pesticides - Solid phase -microextraction of water samples [382]... 

Besides naturally occurring organic phosphorus compounds, the soil organic phosphorus concentration can be increased by manure and slurry application and, to a lesser extent, by the use of phosphorus-containing pesticides. Many soils receive animal manure, in which typical phosphorus concentrations are many times... 

Table 6.3. Chemical designations of the main phosphorus-containing pesticides (Sanchez-Camazano...

The affinity of the organic moiety of phosphorus-containing pesticides with humic substances can lead to their retention in soils and sediments. For example, S4nchez-Martin and Sanchez-Camazano (1991) reported that adsorption of the thio-phosphates methyl parathion and ethyl par-athion by soils is controlled by the organic matter content, while the adsorption of methyl paraoxon and ethyl paraoxon is related to the clay-organic matter complexes. 

Let us focus on the WCOT columns used to implement EPA Method 507 Determination of Nitrogen- and Phosphorus-Containing Pesticides in Water by GC with a Nitrogen-Phosphorous Detector . The method is summarized as follows (50) ... 

FOP fraction is composed of compounds such as nucleic acids, phospholipids, inositol phosphates, phosphoamides, phosphoproteins, sugar phosphates, aminophosphonic acids, phosphorus-containing pesticides, and organic condensed phosphates. 

Gas Chromatographic Determination of Phosphorus-Containing Pesticide Metabolites via Benzylation Zh. Anal. Khim. 34(7) 1421-1423 (1979) CA 91 152593n... 

The flame photometric detector (FPD) is a mass-sensitive detector, which is speciflc for sulfur and phosphorous. The light that is emitted from phosphorus or sulfur combustion products is measured. The detection limit is about 5 pg S s and 50-100 pg P s and the linearity is 10 -10". Main area of use is speciflc detection of sulfur in petroleum and petrochemical samples as well as of phosphorus containing pesticides. 

The retention and acquisition parameters of common nitrogen- and phosphorus-containing pesticides (phosphoric acid esters, atrazines, etc.) are listed in Table 4.13. It is recommended that the excitation parameters are used initially with equal standard values (0.9 V), which may be slightly adjusted in the case of response optimization. The quality of the product ion spectra is not affected (Figure 4.51). A typical standard run in MS/MS acquisition mode is shown in Figures 4.52 and 4.53. Even at the low 10 pg/pL level, the compounds are detected with high S/N values and full MS/MS product spectra for confirmation (Figure 4.51). 

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