scholarly journals Spectrophotometric Determination of Lorsartan Potassium and its Dosage Form by Bromothymol Blue and Phosphate Buffer

2010 ◽  
Vol 7 (1) ◽  
pp. 320-324 ◽  
Author(s):  
L. Latheeshjlal ◽  
P. Parthiban ◽  
V. Alagarsamy ◽  
M. Sunil ◽  
J. Vaidhya Mahul ◽  
...  
Keyword(s):  
Spectrophotometric Method ◽  
Phosphate Buffer ◽  
Dosage Form ◽  
Phosphate Buffer Solution ◽  
Accurate Method ◽  
Bromothymol Blue ◽  
Losartan Potassium ◽  
Buffer Solution ◽  
Solution Ph

Simple, rapid and accurate, spectrophotometric method for the determination of losartan potassium by using bromothymol blue as a chromogen and phosphate buffer solution (pH 3-4) as a diluting agent was developed. The developed colour shows maximum absorbance at 620 nm and it was observed that the absorbance of different dilution from the plots the calibration curve between the concentrations in x-axis, absorbance at y-axis. The recovery studies were also carried out to ensure the reproducibility and repeatability. This recovery studies shows between 96.82-100.08% for the different formulation. Hence, it was concluded that the developed simple, precise and accurate method can be effectively used for the routine analysis of losartan potassium

Non-enzymatic determination of purine nucleotides using a carbon dot modified glassy carbon electrode

2019 ◽  
Vol 11 (30) ◽  
pp. 3866-3873 ◽  
Author(s):  
R. Karthikeyan ◽  
D. James Nelson ◽  
S. Abraham John
Keyword(s):  
Glassy Carbon ◽  
Low Cost ◽  
Phosphate Buffer Solution ◽  
Purine Nucleotides ◽  
Buffer Solution ◽  
Solution Ph ◽  
Carbon Dot ◽  
Enzymatic Determination ◽  
Sensitive Determination

Selective and sensitive determination of one of the purine nucleotides, inosine (INO) using a low cost carbon dot (CD) modified glassy carbon (GC) electrode in 0.2 M phosphate buffer solution (pH 7.2) was demonstrated in this paper.

scholarly journals New Spectrophotometric Method for Determination of Cadmium

2009 ◽  
Vol 6 (s1) ◽  
pp. S496-S500
Author(s):  
K. S. Parikh ◽  
R. M. Patel ◽  
K. N. Patel
Keyword(s):  
Stability Constant ◽  
Spectrophotometric Method ◽  
Basic Medium ◽  
Buffer Solution ◽  
Solution Ph ◽  
Yellow Colour ◽  
Maximum Absorbance ◽  
The Stability

The reagent 2-hydroxy-4-n-butoxy-5-bromopropiophenone thiosemicarbazone (HBBrPT) has been used for the determination of Cd(II) by using spectrophotometric method. The reagent HBBrPT gave an intense yellow colour with Cd(II) solution in basic medium. The maximum absorbance was observed at 440 nm, in basic buffer solution (pH 10.00). The molor absorptivity and Sandell’s sensitivity of Cd(II)-HBBrPT complex were 4035 mol-1cm-1and 0.02765 μg cm-2respectively. The stability constant of 1:2 Cd(II)-HBBrPT complex was 8.46×106. The effect of various iron was also studied.

Electrocatalytic performance of a zinc sulphide nanoparticles-modified carbon paste electrode for the simultaneous determination of acetaminophen, guanine and adenine

2018 ◽  
Vol 10 (11) ◽  
pp. 1362-1371 ◽  
Author(s):  
Mallappa Mahanthappa ◽  
Nagaraju Kottam ◽  
Shivaraj Yellappa
Keyword(s):  
Carbon Paste Electrode ◽  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Zinc Sulphide ◽  
Modified Carbon Paste Electrode ◽  
Carbon Paste ◽  
Buffer Solution ◽  
Guanine And Adenine ◽  
Paste Electrode

The simultaneous electroanalysis of acetaminophen (AC), guanine (G) and adenine (A) was successfully achieved on the zinc sulphide nanoparticles-modified carbon paste electrode (ZnS NPs/CPE) in phosphate buffer solution (PBS).

Resonance Rayleigh Scattering Effect of Immunonanosilver Aggreagations and its Application to Rapid Determination of Trace Hg(II)

2013 ◽  
Vol 664 ◽  
pp. 749-753
Author(s):  
Li Li Xu ◽  
Zhi Liang Jiang ◽  
Ai Hui Liang
Keyword(s):  
Phosphate Buffer ◽  
Rayleigh Scattering ◽  
Sodium Citrate ◽  
Rapid Determination ◽  
Phosphate Buffer Solution ◽  
Resonance Rayleigh Scattering ◽  
Buffer Solution ◽  
Scattering Effect ◽  
Large Particles

Using PEG-10000 and sodium citrate as stabilizer, and NaBH4 as reducer, a stable nanosilvers (AgNPs) sol was prepared. In pH 6.6 phosphate buffer solution containing NaCl, the AgNPs were aggregated to large particles, which lead to resonance Rayleigh scattering (RRS) peak at 350 nm enhancement. Upon addition of cysteine, the peak decreased. The decreased value ΔI is linear to cysteine concentration in the range of 5-60×10-8 mol/L. Thus, a new RRS method was proposed for detection of cysteine.

Coated Carbon Nanotubes at Nano Copper Modified GCE for Simultaneous Determination of Dopamine and Uric Acid

2012 ◽  
Vol 600 ◽  
pp. 238-241
Author(s):  
Xiao Ling Qiang ◽  
Jian Fei Xia ◽  
Zong Hua Wang ◽  
Yan Zhi Xia ◽  
Fei Fei Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Uric Acid ◽  
Phosphate Buffer Solution ◽  
Carbon Electrode ◽  
Cu Nanoparticles ◽  
Buffer Solution ◽  
Solution Ph ◽  
Electrochemically Deposited ◽  
Coated Carbon

Copper (Cu) nanoparticles have been electrochemically deposited onto the glassy carbon electrode (GCE) surface by potentiostatic deposition method and then carbon nanotubes (CNTs) was dropped on the nano-Cu modified electrode surface to get a CNTs/nano-Cu/GCE electrode. The CNTs/nano-Cu/GCE has shown much higher electrocatalytic activity than the CNTs/GCE towards the oxidation of dopamine (DA) and uric acid (UA) in a phosphate buffer solution (pH 6.9). It can be applied to determine DA and UA with satisfactory results.

Understanding the Endocrine Disruptor and Determination of Bisphenol A by Functional Cu-BTABB-MOF/rGO Composite as Facile Rapid Electrochemical Sensor: An Experimental and DFT Investigation

2022 ◽  
Author(s):  
Srikanth Ponnada ◽  
Demudu Babu Gorle ◽  
Maryam Sadat Kiai ◽  
Venkateswara raju Chikkili ◽  
M. Faraji ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Electrochemical Sensor ◽  
Phosphate Buffer ◽  
Endocrine Disruptor ◽  
Phosphate Buffer Solution ◽  
Buffer Solution

A pioneering CuBTABB-MOF/rGO composite customized electrode is fabricated and utilized as a sensor towards identifying Bisphenol A (BPA) ina phosphate buffer solution of pH7.0. Composite is characterized by FTIR, Raman...

Synthesis, characterization, and drug delivery property of 2-N-carboxymethyl-6-O-diethylaminoethyl-chitosan

e-Polymers ◽  
2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Aidi Zhang ◽  
Derun Ding ◽  
Jicun Ren ◽  
Xiangli Zhu ◽  
Youhong Yao
Keyword(s):  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Controlled Delivery ◽  
Protective Agent ◽  
Buffer Solution ◽  
Solution Ph ◽  
H Nmr ◽  
Structure Morphology ◽  
Ft Ir ◽  
Model Drug

Abstract A novel route is demonstrated for the synthesis of 2-N-carboxymethyl-6- O-diethylaminoethyl-chitosan (DEAE-CMC) by incorporation of carboxymethyl groups as hydrophilic moieties to the C2-NH2, and diethylaminoethyl groups as hydrophobic moieties to the C6-CH2OH of the structural unit of chitosan, via a protection-graft-deprotection procedure with benzaldehyde as protective agent. The structure, morphology, and thermal properties of the chitosan graft copolymers were characterized by means of FT-IR, 1H NMR, SEM, TGA and DSC. Chitosan and its derivatives were used as carrier of model drug-Vitamin B12 (VB12), and their controlled delivery behaviour in phosphate buffer solution (pH 7.4) were studied. The results show that the release rate of VB12 from the carrier of DEAE-CMC copolymer becomes much slower than that of chitosan in phosphate buffer solution.

Glucose electro-oxidation on Pt(100) in phosphate buffer solution (pH 7): A mechanistic study

2020 ◽  
Vol 354 ◽  
pp. 136765 ◽  
Author(s):  
Gisele A.B. Mello ◽  
William Cheuquepán ◽  
Valentín Briega-Martos ◽  
Juan M. Feliu
Keyword(s):  
Phosphate Buffer ◽  
Phosphate Buffer Solution ◽  
Mechanistic Study ◽  
Buffer Solution ◽  
Solution Ph ◽  
Electro Oxidation
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