Colorimetric Determination of Seleniumin Various Environmental Samples

2001 ◽  
Vol 48 (1) ◽  
pp. 33-36
Author(s):  
Sukumar Chatterjee ◽  
Ajai Kumar Pillai ◽  
Vinay Kumar Gupta
Keyword(s):  
Environmental Samples ◽  
Colorimetric Determination

Colorimetric Determination of Sulphur Dioxide and Sulphites in Various Environmental Samples

2003 ◽  
Vol 50 (2) ◽  
pp. 257-260 ◽  
Author(s):  
Sukumar Chatterjee ◽  
Ajai K. Pillai ◽  
V. K. Gupta
Keyword(s):  
Sulphur Dioxide ◽  
Environmental Samples ◽  
Colorimetric Determination

Gold nanoparticles functionalized with 2,6-dimercaptopurine for sensitive and selective colorimetric determination of cadmium(ii) in food, biological and environmental samples

2017 ◽  
Vol 9 (38) ◽  
pp. 5598-5603 ◽  
Author(s):  
M. H. Hu ◽  
W. H. Huang ◽  
L. L. Suo ◽  
L. H. Zhou ◽  
L. F. Ma ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Environmental Samples ◽  
Color Change ◽  
Colorimetric Determination ◽  
Biological And Environmental Samples

The proposed method can recognize Cd2+in different samples based on the aggregation of DMP-AuNPs, resulting in a color change.

Colorimetric determination of nitrite in clinical, food and environmental samples using microfluidic devices stamped in paper platforms

2015 ◽  
Vol 7 (17) ◽  
pp. 7311-7317 ◽  
Author(s):  
Thiago M. G. Cardoso ◽  
Paulo T. Garcia ◽  
Wendell K. T. Coltro
Keyword(s):  
River Water ◽  
Water Samples ◽  
Environmental Samples ◽  
Statistical Difference ◽  
Reference Method ◽  
Microfluidic Devices ◽  
Colorimetric Determination ◽  
River Water Samples ◽  
Paper Microfluidic

Paper microfluidic devices were explored to perform the colorimetric determination of nitrite in saliva, sausage, ham, preservative water and river water samples with no statistical difference from a reference method.

Sonochemical preparation of gold nanoparticles for sensitive colorimetric determination of nereistoxin insecticides in environmental samples

Talanta ◽  
2018 ◽  
Vol 188 ◽  
pp. 651-657 ◽  
Author(s):  
Fumiki Takahashi ◽  
Naoto Yamamoto ◽  
Miyuki Todoriki ◽  
Jiye Jin
Keyword(s):  
Gold Nanoparticles ◽  
Environmental Samples ◽  
Colorimetric Determination

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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