Acid-Base Equilibria in Glacial Acetic Acid. II. Spectrophotometric Determination of the Ionization and Dissociation Constants of p,p'-Dimethylaminoazobenzene and Pyridine. The Abnormal Effect of Water on Indicator Bases

1956 ◽  
Vol 78 (1) ◽  
pp. 10-15 ◽  
Author(s):  
S. Bruckenstein ◽  
I. M. Kolthoff
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Determination ◽  
Glacial Acetic Acid ◽  
Dissociation Constants ◽  
Acid Base ◽  
Effect Of Water ◽  
Abnormal Effect

Reverse Phase Liquid Chromatographic Determination of Chlorophacinone and Diphacinone in Bait Formulations

1982 ◽  
Vol 65 (4) ◽  
pp. 927-929
Author(s):  
Brian R Bennett ◽  
Gregory S Grimes
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Chromatographic Determination ◽  
Reverse Phase ◽  
Target Concentration ◽  
External Standard ◽  
Liquid Chromatographic Determination ◽  
Phase Liquid ◽  
Liquid Chromatographic

Abstract Chlorophacinone and diphacinone are extracted at the 0.005% level from grain or paraffinized baits with glacial acetic acid. The target concentration is 0.01 mg/mL. The filtered supernate is chromatographed on a Partisil PXS ODS10/25 liquid chromatography column with premixed and degassed glacial acetic acid-tetrahydrofuran-water (14 + 2 + 9) and detected at 288 nm. The concentration is calculated by using an external standard. The recovery from spiked samples averaged 96.6% for both analytes. The response is linear from 0.001 to 0.040 mg/mL. The coefficient of variation of within-day replicates ranged from 1.1 to 2.5%.

Extraction and Spectrophotometry Determination of Benzthiazide, Hydrochlorothiazide, and Hydroflumethiazide in Pharmaceuticals

1970 ◽  
Vol 53 (3) ◽  
pp. 582-584
Author(s):  
F Raymond Fazzari
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Determination ◽  
Organic Phase ◽  
Active Ingredient ◽  
Separation Techniques

Abstract A method has been developed for the determination of benzthiazide, hydrochlorothiazide, and hydroflumethiazide in pharmaceuticals. The procedure is rapid and specific and employs established separation techniques. The active ingredient is eluted from a basic Celite column with an acetic acid-ether solvent and extracted from the organic phase into NaOH for the spectrophotometric determination.

Spectrophotometric determination of bismuth with diethylenetriaminepenta-acetic acid

Talanta ◽  
1978 ◽  
Vol 25 (11-12) ◽  
pp. 691-692 ◽  
Author(s):  
P. Nenova ◽  
D. Kantcheva ◽  
B. Karadakov
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Determination
Sign in / Sign up

Export Citation Format

Share Document