Lily, R. E. C., Cole, P. V., and Hawkins, L. H. (1972). Brit. J. industr. Med., 29, 454-457. Spectrophotometric measurement of carboxyhaemoglobin. An evaluation of the method of Commins and Lawther. The spectrophotometric method of Conmmins and Lawther for the measurement ofcarboxyhaemoglobin (COHb) concentration was evaluated for both accuracy and sensitivity. The method was calibrated by equi...

A simple kinetic spectrophotometric method is described for the determination of famotidine. The method is based on the oxidation of the drug with alkaline potassium permanganate. The reaction is followed spectrometrically by measuring the rate of change of the absorbance at 610 nm. The initial-rate and fixed-time (at 12 min) methods are adopted for determining the drug concentration. The calib...

Acetylcholine is an essential neurotransmitter found throughout the nervous system. Its action on postsynaptic receptors is regulated through hydrolysis by various carboxylesterases, especially cholinesterases (ChEs). The acute toxicity of organophosphate (OP) compounds is directly linked to their action as inhibitors of ChE. One widely used assay for evaluating ChE activity is a spectrophotome...

Lily, R. E. C., Cole, P. V., and Hawkins, L. H. (1972). Brit. J. industr. Med., 29, 454-457. Spectrophotometric measurement of carboxyhaemoglobin. An evaluation of the method of Commins and Lawther. The spectrophotometric method of Conmmins and Lawther for the measurement ofcarboxyhaemoglobin (COHb) concentration was evaluated for both accuracy and sensitivity. The method was calibrated by equi...

____________________________________ Part I, Sampling__ ____________ _____________ Sample preservation _,____.___ ___.___.__._ References__________-._______,-_-___--_-Carbon, all forms. ____-________---____.____ References..-,. __._ _________________ Chlorophylls.__-__ __._„____,_____._____ Extractive spectrophotometric method. __ References. ______..„__________________ Color. ___---_-_._____. ...

the complexation of sodium molybdate with para-sulfonatocalix [4] arene was studied in thetemperature range from 20 to 40 °c and ph = 5.8 by spectroscopic method in water solution. thestability constants of complexes were calculated by the multiwavelength analysis of spectral datausing squad program. the equilibrium constant, spectroscopic data, molar absorptivities andconcentrations of all spe...

A derivative spectrophotometric method was developed to determine NO3(-)-N in plant tissues. The method is based on measurement of the first-derivative spectrum of nitrosalicylic acid in basic solution. The nitrosalicylic acid was obtained by reaction of samples with salicylic acid in concentrated sulfuric acid and was used by Cataldo et al. in nonderivative spectrophotometry. The main strength...

In this study, boroxine derivative (K₂[B₃O₃F₄OH]) was tested as an inhibitor of horseradish peroxidase (HRP) by spectrophotometric and electrochemical methods. The activity of horseradish peroxidase was first studied under steady-state kinetic conditions by a spectrophotometric method which required the use of guaiacol as a second substrate to measure guaiacol peroxidation. The results of this ...

The diagnostic accuracy of two methods for measuring serum glutamic-oxaloacetic transaminase activity was examined in 50 cases of acute myocardial infarction proven by autopsy and in 12 nonfatal cases documented by rigid clinical criteria. All activities measured with the revised spectrophotometric method were elevated during the second day after infarction, and all patients had an elevated act...

The reagent 4-hydroxybenzaldehyde thiosemicarbazone (4-HBTS) has been used for the determination of Mo(VI) by spectrophotometric method. The reagent 4-HBTS gives green colour with Mo(VI) solution of weak acidic medium and the maximum absorbance was observed at 365nm, in acidic buffer p H 6.0. The molar absorptivity and Sandell’s sensitivity of Mo(VI)4-HBTS complex are 1.25 x 10 L mol cm and 0.0...