Stepwise injection spectrophotometric determination of epinephrine

A Miniaturized Stepwise Injection Spectrophotometric Analyzer

“…It should be pointed out that in the case of μSWIA the production of waste and the consumption of the sample and reagent solutions are lower than that in the previously proposed SWIA method for cysteine determination in biologically active supplements and fodders (60-times less). 18 However, the throughput of μSWIA is less than that in SWIA (almost twice) due to the different types of pumps being used (syringe and peristaltic pumps, respectively). 110 ± 13 mg 53 ± 4 mg 1.22 ± 0.08 g kg -1 110 ±18 mg 54 ± 9 mg 1.17 ± 0.09 g kg -1 0.64 0.83 1.70 …”

“…The ammonium salt of the 18-MPA, (NH4)6P2Mo18O62 × 14H2O, was synthesized according to a described procedure. 15 A 0.01 M solution of 18-MPA was prepared by dissolving 0.7855 g of the synthesized salt and diluting to 25 mL with distilled water. All other chemicals were of analytical reagent grade.…”

“…18 Optimization of the chemical and flow variables is strongly simplified by using the flow configuration with the MC because most of the optimal values can be directly taken from information obtained by a preliminary investigation of the reaction under batch conditions. The initial set of used parameter values was: 50 μL of 0.1 mM cysteine, 50 μL of acetate-acetic buffer solution (pH 5.0) and 50 μL of 18-MPA solution.…”

Sensitive Determination of Epinephrine Using Kinetic Spectrophotometric Method

“…In view of the great impor tance of quantification of epinephrine, different analytical techniques have been used in different levels and matrices such as electrochemical 3,4 , chromatographic 5 and spectrophotometric 6 methods. Based on literature, electrochemical methods are the most common methods in last decade.…”

Development of Glassy Carbon Electrode Modified with Ruthenium Red-multiwalled Carbon Nanotubes for Simultaneous Determination of Epinephrine and Acetaminophen

“…5 Many methods have been described for the determination of EP, such as chromatographic methods, [6][7][8] capillary electrophoresis. 9,10 flow injection, 11 chemiluminescence, 12 fluorimetry 13 and spectrophotometry. 14,15 Many of modified GC electrodes have been used for the electrochemical determination of EP; they include with poly caffeic acid electrode, 16 poly(eriochrome Black T), 17 polyrutin, 18 poly(taurine) 19 and modified carbon paste electrode with pre-anodized inlaying ultrathin with nichrome, 20 2,2-[1,2-ethanediylbis(nitriloethylidyne)]-bis-hydroquinone double-wall carbon nanotube, 21 as well as modified gold electrode with 2-(2,3-dihydroxy phenyl)-1,3-dithiane self-assembled monolayer.…”