Are there any modified QuECH methods to analyze bitertanol pesticide in black tea using LCMS/MS coupled with C-18 column?

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Narong Chamkasem

Try to add this to the LC/MS method I sent you earlier.

Imani Sohrab

Are you trying this fungicide residue or deposit,no problem,you can mix the black tea ,in ice temp.. then take 5 gr for analysis best solvent is acetinitryl , 10 to 15 ml and for color sepration PSA in needed , in extraction procedure PH is important.

the solvent was acetonitryl , after extraction procedure you can inject in a relibele chromatographic system such as GC or GC/MS system for this fungicide GC/MS is suitable.