Results 211 to 220 of about 48,569 (262)
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Spectrophotometric determination of muzolimine
Talanta, 1988Five simple, rapid and sensitive spectrophotometric procedures for the determination of muzolimine in bulk samples and pharmaceutical dosage forms are described. The methods are based on the formation of coloured species when muzolimine is reacted with 3-methyl-2-benzothiazolinone hydrazone hydrochloride, p-N,N-dimethylphenylenediamine dihydrochloride ...
C S, Sastry +3 more
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The spectrophotometric determination of Ampicillin
The Analyst, 1967A method is described for the determination of Ampicillin (α-amino-benzyl penicillin) based on the spectrophotometric measurement at 320 mµ of a compound formed by acid degradation of the penicillin at 75° C in the presence of buffer solution at pH 5·2 and a trace of a copper salt.
J W, Smith, G E, de Grey, V J, Patel
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Spectrophotometric Determination of Pivampicillin Hydrochloride
Journal of Pharmaceutical Sciences, 1974A spectrophotometric method for the determination of pivampicillin hydrochloride is described based on the colorimetric reaction of chromotropic acid with formaldehyde, which is formed in a stoichiometric quantity on hydrolysis of pivampicillin hydrochloride. The analytical results are compared with those obtained by traditional methods.
E, Marchi, G, Mascellani, D, Boccali
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Spectrophotometric Determination of Aluminium and Nickel
Annali di Chimica, 2004AbstractA simple spectrophotometric method, based on the complexes with xylenol orange (XO) and EDTA, is presented for the rapid determination of aluminium and nickel, respectively, in synthetic samples of hydrotalcite. The method only requires the solubilization in sulphuric acid of the inorganic material before the ligand addition.
CARPANI, IRENE +2 more
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Spectrophotometric determination of formaldehyde in air
Talanta, 1983A spectrophotometric method for the determination of formaldehyde in air is described, based on the colour reaction of formaldehyde, p-aminoazobenzene and sulphur dioxide in hydrochloric acid medium. Beer's law is obeyed at 505 nm in the range 2-12 mug of formaldehyde per 25ml of final solution (0.08-0.48 ppm). Optimum conditions for colour development,
P, Verma, V K, Gupta
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A spectrophotometric method for determination of sphingomyelinase
Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1978A colored derivative of sphingomyelin was synthesized and used as substrate for several sphingomyelinases. The compound is N-omega-trinitrophenyl-aminolaurylsphingosylphosphorylcholine. The rate of hydrolysis of this substrate was compared to that of bovine brain sphingomyelin, labelled with tritium in the choline moiety.
S, Gatt, T, Dinur, Y, Barenholz
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Spectrophotometric determination of pyrrole derivatives
Talanta, 1976A simple, reliable and rapid method for the spectrophotometric determination of some pyrrole derivatives with concentrated sulphuric acid has been developed. The results show a maximum deviation of about 0.2 mug.
J P, Sharma, V K, Shukla, A K, Dubey
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Spectrophotometric determination of maprotiline hydrochloride
The Analyst, 1988A simple and sensitive spectrophotometric method has been developed for the assay of maprotiline hydrochloride. The method is based on the formation of a complex between the drug and p-chloranil at 60 °C in dioxane, using a three-fold molar excess of the reagent; complex formation is complete in less than 30 min. The complex shows maximum absorbance at
L, Ersoy, B, Alpertunga
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Ultraviolet Spectrophotometric Determination of Reserpine*
Journal of the American Pharmaceutical Association (Scientific ed.), 1954Methods are described for the determination of reserpine in crude extracts of Rau-wolfia root and in fractions of varying degrees of purity. Relatively pure preparations are assayed directly by ultraviolet spectrophotometric methods comprising appropriate corrections for ultraviolet absorbing contamination. Cruder preparations are assayed for reserpine
E H, SAKAL, E J, MERRILL
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Spectrophotometric determination of ascorbic acid
Analytical Biochemistry, 1979Abstract A spectrophotometric method for determining ascorbic acid based on the redox reaction between a copper (II)-2,2′-biquinoline solution and ascorbic acid was developed. The purple color of the copper (I)-2,2′-biquinoline complex formed in a buffered acetone-water solution was measured at 540 nm.
H H, Shieh, T R, Sweet
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