scholarly journals Studies on Organic Reagents for the Colorimetric Analysis of Germanium. III. Colorimetric Determination of Germanium with a New Reagent

1956 ◽  
Vol 29 (7) ◽  
pp. 812-815 ◽  
Author(s):  
Kenjiro Kimura ◽  
Masako Asada
Keyword(s):  
Colorimetric Determination ◽  
Colorimetric Analysis ◽  
Organic Reagents

Colorimetric Determination of Metal Ions Using Smartphone

2018 ◽  
Vol 769 ◽  
pp. 235-241
Author(s):  
Eldar V. Urazov ◽  
Maria A. Gavrilenko ◽  
Mikhail K. Belikov
Keyword(s):  
Metal Ions ◽  
Color Change ◽  
Solid Phase ◽  
Colorimetric Determination ◽  
Phase Extraction ◽  
Colorimetric Analysis ◽  
Digital Photo ◽  
Visual Color ◽  
Polymethacrylate Matrix

The visible sensing determination with color change after solid phase extraction using polymethacrylate matrix and colorimetric smartphone-based technique have been highlighted. The smartphone-based method based on digital photo of transparent polymer optode for metal ions determination is proposed for diapason 0.02-60 mg/L. The optical property of polymer matrix enables a visual color change during its reaction with the analytes. Proposed method is compared with spectrophotometric and colorimetric analysis.

Development of test placers for blister colorimetric analysis of phosphate ions

2020 ◽  
pp. 24-29
Author(s):  
Aleksey Zhevnerov ◽  
Ravil Baybyekov ◽  
Sergey Belopuhov ◽  
Andrey Bochkarev
Keyword(s):  
Quantitative Determination ◽  
Phosphate Concentration ◽  
Colorimetric Determination ◽  
Colorimetric Analysis ◽  
Ion Concentrations ◽  
Phosphate Ion ◽  
Phosphate Ions ◽  
Preliminary Preparation ◽  
Colorimetric Reaction

Variants of the compositions of a series of placers for visually blister colorimetric determination of phosphate ion concentrations in a blister cell (tablet for tablets) containing a mixture of reagents are proposed. The placers allow quantitative determination of the phosphate concentration in various objects without preliminary preparation of reagent solutions. The application of reagents to the surface of silica gel makes it possible to isolate all reagents until a chemical reaction occurs. The composition and conditions of deposition of crystalline substances – reagents capable of providing a sufficiently high acidity with the addition of a few drops of a solution and an optimal reducing agent for blister conditions were optimized. The visual colorimetric reaction is carried out under conditions when the volume of the added solution is 0.1–0.2 ml.

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Colorimetric Determination of Amoxicillin in Pure and some Pharmaceutical Formulations Via Reaction with Potassium Permanganate as Oxidant Reagent

2019 ◽  
Vol 10 (02) ◽  
Author(s):  
Abbas Shebeeb Al-kadumi ◽  
Sahar Rihan Fadhel ◽  
Mohammed Abdullah Ahmed ◽  
Luma Amer Musa
Keyword(s):  
Potassium Permanganate ◽  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Atomic Emission ◽  
Basic Medium ◽  
Photometric Method ◽  
Colorimetric Determination ◽  
Spectrophotometric Methods ◽  
Label Claim

We proposed two simple, rapid, and convenient spectrophotometric methods are described for the determination of Amoxicillin in bulk and its pharmaceutical preparations. They are based on the measurement of the flame atomic emission of potassium ion (in first method) and colorimetric determination of the green colored solution for manganite ion at 610 nm formed after reaction of Amoxicillin with potassium permanganate as oxidant agent (in the second method) in basic medium. The working conditions of the methods were investigated and optimized. Beer's law plot showed a good correlation in the concentration range of 5-45 μg/ml. The detection limits and relative standared deviations were (2.573, 2.814 μg/ml) (2.137, 2.498) for the flame emission photometric method and (1.844, 2.016 μg/ml) (1.645,1.932) for colorimetric methods for capsules and suspensions respectively. The methods were successfully applied to the determination of Amoxicillin in capsules and suspensions, and the obtained results were in good agreement with the label claim. No interference was observed from the commonly encountered additives and expectancies.

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