Title of Article :
Catalytic-spectrophotometric determination fo maolybdenum in plant and steel with nile red-hydrazine dihydrochloride
Title Of Periodical :
ANALYTICAL LETTERS
VolumNumber :
V.22, No.12
Descriptors :
Molybdenum,Nile red-hydrazine,Catalysis,Plant material,Steel
Abstract :
Molybdenum was determined by its catalytic effect on the reduction of nile red with hydrazine dihydrochloride. The method was based on measuring the decrease in absorbance of nile red after 3 minutes at 30 C. The calibration curve was linear over the range of 50 - 30000 ng.ml**-1. The detection limit was 30 ng.ml**-1 of Mo(VI). A cation exchanger resin was used to remove interfering ions. Plant materials and steel were used for the determination of molybdenum content. The relative standard deviation was 0.80,for 250 ng.ml**-1 of Mo(VI). Molybdenum could be determined in the presence of even high concentration of phosphate and tungsten.
