Colorimetric Determination of Panthenol and Pantothenates

Abstract

Because the method is applicable over a wide range of concentration, 0.05 to 2.0 mg. per ml., it should be useful in a variety of problems involving levulose measurements in fruit.

Smartphone‐based colorimetric determination of gamma‐butyrolactone and gamma‐hydroxybutyrate in alcoholic beverage samples

“…The developed color was found to be stable for over 2 weeks for a 1.0 mg/ml GBL solution. However, previous studies have shown that the color developed immediately [41] remained unchanged for at least 5 min, and decreased to 76% of its original value at 25 min [42]. Figure 1C shows the image obtained via the color picker and helper.…”

Colorimetric Determination of Calcium Pantothenate

“…Up to the present, control of this constituent in these mixtures has been based on microbiological assays ( 2 , 7 ) . Chemical methods using 1,2naphthaquinone-4-sodium sulfonate ( 1 ) and 3,4-dinitrophenylhydrazine ( 5 ) have been described for the determination of p-alanine, a hydrolytic cleavage product of pantothenic acid, A colorimetric method (8) has been reported based on Feigl's ( 3 ) reaction for esters and lactones after hydrolysis of pantothenic acid or panthenol to pantoyl lactone.…”

Development and validation of reversed phase high performance liquid chromatography method for determination of dexpanthenol in pharmaceutical formulations

“…Several methods have been reported on the analysis of dexpanthenol depending on hydrolysis of dexpanthenol into the primary amine which then formed colored products with some reagents such as iodine [5], 1,2-napthahynone-4-sulphonate [6], hydroxylamine [7], ninhydrine [8], vanillin [9].…”