Record Details

Spectrophotometric method for determination of phosphine residues in coffee seeds.

IR@CSIR-CFTRI

View Archive Info
 
 
Field Value
 
Relation http://ir.cftri.com/354/
JFST-1990-2
 
Title Spectrophotometric method for determination of phosphine
residues in coffee seeds.
 
Creator Rangaswamy, J. R.
 
Subject 04 Coffee
26 Pesticide Chemistry
 
Description A method for determination of phosphine (PH) residues on/in coffee seeds has been developed based on the reaction of phosphine
with silver nitrate in 2% aqueous methanol. The linear relationship between absorbance of egg yellow chromophore and concentration
of PH, is obeyed between 0.025 and 0.2 µg PH, in 3 ml solvent. PH, residue in fumigated coffee seeds, is determined by soaking
lOg sample in 15 to 30 ml solvent for one hr and the absorbance at 410 nm of the filtrate is read against the crop control blank of
the same sample size. The method is sensitive with lower detectable and estimatable limits of 0.01 and 0.025 µ,g PH, respectively.
Recovery of added PH, from a closed system is 95%.
 
Date 1990
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://ir.cftri.com/354/1/jfst_1990_27%281%29_33-37.pdf
Rangaswamy, J. R. (1990) Spectrophotometric method for determination of phosphine residues in coffee seeds. Journal of Food Science and Technology (India), 27 (1). pp. 33-37. ISSN 0022-1155