scholarly journals The Spectrophotometric Determination of Phosphate Following the Collection of Ion Pair of Molybdophosphate with Bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) on an Organic Solvent-Soluble Membrane Filter

1989 ◽  
Vol 62 (5) ◽  
pp. 1482-1485 ◽  
Author(s):  
Mitsuhiko Taga ◽  
Masahiko Kan
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Membrane Filter ◽  
Ion Pair

Spectrophotometric determination of traces of silicon in water after collection as silicomolybdenum blue on an organic-solvent-soluble membrane filter

1987 ◽  
Vol 59 (5) ◽  
pp. 787-789 ◽  
Author(s):  
Issei. Kasahara ◽  
Ritsuko. Terai ◽  
Yukari. Murai ◽  
Noriko. Hata ◽  
Shigeru. Taguchi ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Membrane Filter

scholarly journals Extractional - Spectrophotometric Determination of Fenbendazole and Ornidazole in Pharmaceutical Formulations

2000 ◽  
Vol 68 (1) ◽  
pp. 109-122 ◽  
Author(s):  
ALI Z. ABU ZUHRI ◽  
WOLFGANG VOELTER ◽  
SULEIMAN AL-KHALIL ◽  
IMAD SALAHAT
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Pharmaceutical Formulations ◽  
Bromothymol Blue ◽  
Ion Pair ◽  
The Other ◽  
Extraction Time ◽  
Reagent Concentration ◽  
The Mean

Methods for spectrophotometric determination of fenbendazole and ornidazde are described. The methods are based on the formation and extraction of the ion-pair complex formed between bromothymol blue and either fenbendazole (FBZ) or ornidazole (ORN). The extracted coloured complexes absorb at 416 and 446 nm, respectively. The effect of different factors, e.g. pH, organic solvent, reagent concentration, extraction time, shaking time and common interfering species have been investigated. Fenbendazole and ornidazole can be determined over the range 1.2 to 24.0 ppm and 5.5 to 77.0 ppm, respectively. The precision of the methods was tested for the determination of pure samples of FBZ and ORN and the mean RSD was found to be 3.0 and 2.3% for FBZ and ORN, respectively.The proposed methods were successfully applied for the determination of FBZ and ORN in commercially dosage fornis. A comparison between the suggested methods and the other reported methods was also studied.

scholarly journals Preconcentration on Organic Solvent-Soluble Membrane Filter and Spectrophotometric Determination of Trace Cobalt in Biological Samples.

1997 ◽  
Vol 13 (Supplement) ◽  
pp. 131-136 ◽  
Author(s):  
Tadao SAKAI ◽  
Michiko SUZUI ◽  
Hiroaki HIGUCHI ◽  
Yasuhisa KAJITA ◽  
Tetsuo UCHIDA
Keyword(s):  
Organic Solvent ◽  
Spectrophotometric Determination ◽  
Biological Samples ◽  
Membrane Filter
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