Colorimetric Determination of Sulfur Dioxide in Air Using a Droplet Collector of Malachite Green Solution

1999 ◽  
Vol 62 (2) ◽  
pp. 273-281 ◽  
Author(s):  
Márcio Raimundo Milani ◽  
José Anchieta Gomes Neto ◽  
Arnaldo Alves Cardoso
Keyword(s):  
Sulfur Dioxide ◽  
Malachite Green ◽  
Colorimetric Determination ◽  
Green Solution

Temperature Effect on Colorimetric Determination of Sulfur Dioxide in Dried Fruits

1961 ◽  
Vol 44 (4) ◽  
pp. 641-642
Author(s):  
D H Taylor ◽  
M W Miller ◽  
F S Nury ◽  
J E Brekke
Keyword(s):  
Sulfur Dioxide ◽  
Temperature Effect ◽  
Colorimetric Determination ◽  
Dried Fruits

Colorimetric Determination of Tetracycline Hydrochloride in Pharmaceutical Preparations

1987 ◽  
Vol 70 (4) ◽  
pp. 686-688 ◽  
Author(s):  
Utpal Saha
Keyword(s):  
Copper Complexes ◽  
Colorimetric Method ◽  
Pharmaceutical Preparations ◽  
Molar Absorptivity ◽  
Tetracycline Hydrochloride ◽  
Colorimetric Determination ◽  
Reagent Blank ◽  
Yellowish Green ◽  
Green Solution

Abstract A simple, sensitive, and rapid colorimetric method is presented for the estimation of tetracycline hydrochloride as the pure drug and in formulations. The proposed method is based on the reaction of tetracycline HC1 with cupric chloride in an alkaline medium to give a yellowish green solution whose absorbance is measured at 400 nm against a reagent blank. The color obeys Beer's law in the concentration range of 0-20 μg/mL. Molar absorptivity and Sandell's sensitivity of the yellowish-green copper complexes of tetracycline HC1 are 1.99 x 104 Lmol-1 cm-1 and 0.0241 ppm, respectively.

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum
Sign in / Sign up

Export Citation Format

Share Document