Spectrofluorometric Assay of Thiamine Hydrochloride in Injections and Multivitamin Preparations

1988 ◽  
Vol 71 (6) ◽  
pp. 1131-1133
Author(s):  
Abdel-Maboud I Mohamed ◽  
Samiha A Hussein ◽  
Salwa R El-Shabouri
Keyword(s):  
B Vitamins ◽  
Acetonitrile Solution ◽  
Thiamine Hydrochloride ◽  
Fluorescent Product ◽  
Aqueous Acetonitrile ◽  
Spectrofluorometric Method

Abstract A spectrofluorometric method is described for the determination of thiamine hydrochloride. The method is based on formation of a fluorescent product by oxidation of thiamine HC1 with 2,3,5,6-tetrabromo- l,4-benzoquinone in aqueous acetonitrile solution. The reaction product is stable for at least 6 h and shows excitation and emission maxima around 355 and 420 nm, respectively. The method is highly selective for thiamine HC1 in the presence of other B vitamins. Thiamine HC1 can be determined at concentrations as low as 20-160 ng/ mL of the final solutions. When the method was applied to the determination of thiamine HC1 added to some commercially available multivitamin preparations, recoveries were 98.78-99.98%

Investigation and Analytical Applications of the Reaction of N1-Methylnicotinamide and Active Methylene Containing Drugs

2020 ◽  
Vol 17 ◽  
Author(s):  
Heba A. Elsebaie ◽  
Mervat H. Elhamamsy ◽  
Khaled M. Elokely ◽  
Mohammed A. Eldawy
Keyword(s):  
Quality Control ◽  
Free Energy ◽  
Spectral Analysis ◽  
Quantitative Analysis ◽  
Geometry Optimization ◽  
Fluorescent Product ◽  
Spectrofluorometric Method ◽  
Active Methylene ◽  
Methylene Group

Background: The reaction between N1-methylnicotinamide iodide (NMNI) and the active methylene group containing compounds yields a fluorescent product, which can be used in the quantitative determination of certain drugs. Objective: The objective is to develop, adapt and validate a simple spectrofluorometric method for the quantitative analysis of modafinil 1, budesonide 2, allicin 3 and florfenicol 4. Results: A C4 cyclization pathway was confirmed for the formation of the fluorophore. The spectrofluorometric method showed good linearity (R2= 0.996-0.999) over concentrations of 1-50 ng/mL, 0.5-5 ng/mL, 60-150 pg/mL, and 1-15 ng/mL of the standard solutions of 1, 2, 3, and 4, respectively. Methods: Spectral analysis (elemental analysis, 1H, 13C NMR, MS), computational methods (geometry optimization, Gibbs free energy and pKa calculations) and spectrofluorometric approaches were conducted. Conclusion: The proposed method is simple and suitable for quality control and assurance studies

A Simple Spectrofluorometric Method for the Determination of Total Auxins in Mung Bean Sprouts

2020 ◽  
Vol 75 (11) ◽  
pp. 1404-1407
Author(s):  
Aziguli Yigaimu ◽  
Jiahua Chang ◽  
Amina Hoji ◽  
Turghun Muhammad ◽  
Burabiye Yakup ◽  
...  
Keyword(s):  
Mung Bean ◽  
Mung Bean Sprouts ◽  
Spectrofluorometric Method ◽  
Bean Sprouts

scholarly journals DETERMINATION OF THIAMINE HCL (VITAMIN B1) AND PYRIDOXINE HCL (VITAMIN B6) CONTENT IN TABLET BY FTIR

2016 ◽  
Vol 8 (10) ◽  
pp. 257 ◽  
Author(s):  
Ilma Nugrahani ◽  
Citra Kartini
Keyword(s):  
Vitamin B6 ◽  
Dosage Form ◽  
Vitamin B1 ◽  
Area Under The Curve ◽  
Thiamine Hydrochloride ◽  
Compound Identification ◽  
Quantitation Limit ◽  
Validation Parameters ◽  
Tablet Dosage

<p><strong>Objective: </strong>The combination of thiamine hydrochloride (vitamin B1) with pyridoxine hydrochloride (vitamin B6) has been efficacious to help the metabolism of carbohydrates and amino acids. FTIR (Fourier transform infrared) is a technique widely used in compound identification and determination of functional groups but rarely used for the quantitative purposes. This study aims to obtain a analysis determination method of this vitamin combination simultaneously in tablet dosage form using FTIR.</p><p><strong>Methods: </strong>Amount of vitamin B1 and B6 standard were mixed with KBr crystal in a series of concentration (% w/w) in kalium bromide (kbr) crystal, then measured with FTIR. These spectrums yielded were transformed into an absorbance afterward changed to its derivative. The finest spectrum, which showed the best specificity and linearity, was selected and its area under the curve was calculated. The other validation parameters: accuracy, precision, detection limit, quantitation limit, and ranges, next were tested and determined. The validated method than was used to analyze the levels of vitamin B1 and B6 simultaneously in the tablets.</p><p><strong>Results: </strong>Vitamin B1 and B6 have the linear concentration range from 0.5 to 3.00% w/w. The regression equation for vitamin B1 is y = 0.0608 x-0.0176 with r = 0.9997 and Vx0 = 1.5047%, for vitamin B6: y = 0.0977 x+0.0079 r = 0.9995 and Vx0 = 1.7832%. Recovery results of vitamin B1: 98.98 to 100.93%, while B6: 99.06 to 100.43%. Intra-day and inter-day precision for vitamin B1: 1.73; 1.62; 1.48, and 0.58%, meanwhile for vitamin B6: 1.29; 1.60; 1.78, and 1.39%. The limits of detection and quantitation for vitamin B12 was 0.079 and 0.263% w/w respectively, and for vitamin B6, was: 0.093 and 0.311% w/w. The tablets from the market were tested showed the results that meet with compendia requirements.</p><p><strong>Conclusion: </strong>FTIR can be used for the determination of levels of vitamin B1 and B6 simultaneously in tablet dosage form and have met the validation requirements.</p>

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