Collaborative Study of Infrared Methods for Phorate in Formulations
Abstract An infrared method for the determination of phorate in 5% and 10% granules was studied by 10 collaborators. In the method, the formulation is eluted from the carrier with acetonitrile, the solvent is removed by evaporation, and the residue is dissolved in cyclohexane. The absorbance of the solution is measured at 8.32 μ and the phorate content is determined by comparison with a sample of purified phorate treated in the same manner. Results show good agreement between replicates and laboratories. It is recommended that the method for phorate in granular formulations be adopted as official, first action.
Keyword(s):
1971 ◽
Vol 54
(3)
◽
pp. 725-727
◽
1972 ◽
Vol 55
(5)
◽
pp. 1027-1030
◽
1999 ◽
Vol 82
(5)
◽
pp. 1156-1162
◽
1982 ◽
Vol 65
(3)
◽
pp. 696-700
◽
1966 ◽
Vol 49
(4)
◽
pp. 726-730
◽
Keyword(s):