Total toxic residue analytical method

Vacuum-filtration system (Kiriyama funnel or equivalent) 

Fused-silica megabore column, DB17, 15 m x 0.53-mm i.d., 1-p.m fllm thickness, (50% phenyl)-methylpolysiloxane 

Hewlett-Packard Model 5890 gas chromatograph with capillary split/splifless inlet with nitrogen-phosphorus detector equipped with a Model 7673A autosampler 

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The Total toxic residue analytical method is provided for plant, soil and water samples. 

Total toxic residue analytical method (for rice plant)... 

In the Total toxic residue analytical method , careful handling is recommended for concentrating steps to prevent the loss of volatile 2-TFBA and 2-TFBA Me-ester. 

All of the compounds (pyraflufen-ethyl and its metabolites) are converted to E-2 and quantified as the total toxic residue of pyraflufen-ethyl. The conversion to E-2 is carried out by oxidative decomposition with concentrated sulfuric acid. The reaction mixture is extracted with a solvent and subjected to simple cleanup, followed by GC/NPD analysis. This method is rapid and simple compared with the Multi-residue analytical method , and has wide applicability to different varieties of the samples, such as plant materials, soils and water, with only minor adjustment of the analytical method. 

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