Antimony compounds extracted from enamel-ware by citric acid solutions

The Analyst ◽  
1935 ◽  
Vol 60 (709) ◽  
pp. 220 ◽  
Author(s):  
R. H. Burns
Keyword(s):  
Citric Acid ◽  
Acid Solutions

Studying the Efficiency of Inhibitors in Chemical Cleaning of Heat-and-Power Equipment by Citric Acid Solutions

2020 ◽  
Vol 67 (1) ◽  
pp. 68-71
Author(s):  
R. T. Burganov ◽  
A. R. Gilmullina ◽  
M. A. Kirilova ◽  
E. A. Kovrizhnykh
Keyword(s):  
Citric Acid ◽  
Power Equipment ◽  
Acid Solutions ◽  
Chemical Cleaning

Molecular Interactions Investigation of L-Histidine in Water and in Aqueous Citric Acid at Different Temperatures Using Volumetric and Acoustic Methods

2018 ◽  
Vol 232 (3) ◽  
pp. 393-408 ◽  
Author(s):  
Dinesh Kumar ◽  
Shashi Kant Sharma
Keyword(s):  
Citric Acid ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Acid Solutions ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Acoustic Methods ◽  
Different Temperatures

AbstractDensities,ρand ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg−1) in water and 0.1 mol·kg−1aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume ΦV, limiting apparent molar volume ΦVOand the slopeSV, partial molar expansibilities ΦEO, Hepler’s constant, adiabatic compressibilityβ, transfer volume ΦV, trO, intermolecular free length (Lf), specific acoustic impedance (Z) and molar compressibility (W) were calculated. The results are interpreted in terms of solute–solute and solute–solvent interactions in these systems. It has also been observed that L-histidine act as structure maker in water and aqueous citric acid.

Solute clusters in aqueous citric acid solutions

1991 ◽  
Vol 46 (12) ◽  
pp. 3283-3287 ◽  
Author(s):  
Kazunari Ohgaki ◽  
Yoshihiro Makihara ◽  
Makoto Morishita ◽  
Masahiro Ueda ◽  
Norio Hirokawa
Keyword(s):  
Citric Acid ◽  
Acid Solutions

Electrochemical studies with tin electrodes in citric acid solutions

1990 ◽  
Vol 20 (4) ◽  
pp. 672-676 ◽  
Author(s):  
B. F. Giannetti ◽  
P. T. A. Sumodjo ◽  
T. Rabockai
Keyword(s):  
Citric Acid ◽  
Electrochemical Studies ◽  
Acid Solutions

scholarly journals Investigating matrix interference in the pharmacopeial limit test for aluminum in citric acid: a re-examination, for revision of the method

Pharmacia ◽  
2022 ◽  
Vol 69 (1) ◽  
pp. 9-13
Author(s):  
Theerasak Rojanarata ◽  
Kittithat Maithongdee ◽  
Nattapong Yuwansri ◽  
Sirada Kaewprasert ◽  
Thana Thanayutsiri ◽  
...  
Keyword(s):  
Citric Acid ◽  
Solvent Extraction ◽  
Acid Solution ◽  
Acid Solutions ◽  
Matrix Interference ◽  
Citric Acid Solution ◽  
Metal Chelating ◽  
Limit Test ◽  
The Matrix ◽  
Blank Solution

In many pharmacopoeias, the limit test used for determining the level of aluminum in citric acid labeled for use in the manufacture of dialysate, is based on solvent extraction using 8-hydroxyquinoline and measurement of fluorescence. However, the fluorescence intensity (F.I.) readout from the extract of citric acid samples has been found to be highly dubious, showing low value, and even lower than that of a blank solution. The aim of this work therefore was to examine what effects the matrix has on the test. The comparison of the two standard curves of aluminum solutions in water, against those prepared in citric acid solutions revealed that they differed greatly in terms of slope and y-intercept. In addition, the F.I. values on the plot of the citric acid solution were much lower than that prepared in the water. In another experiment, a decrease in the F.I. of aluminum solution was clearly seen when the co-existing concentration of citric acid was increased. The results inferred that citric acid interfered with the test due to its acidity and metal-chelating capabilities. Based on this evidence, the pharmacopeial limit test for aluminum in citric acid should be revised; otherwise, it could yield results that underestimate aluminum levels and lead to inaccurate conclusions

scholarly journals The usage of natural materials for the green acoustic panels based on the coconut fibers and the citric acid solutions

2018 ◽  
Vol 1075 ◽  
pp. 012048 ◽  
Author(s):  
Z A Rachman ◽  
S S Utami ◽  
J Sarwono ◽  
R Widyorini ◽  
H R Hapsari
Keyword(s):  
Citric Acid ◽  
Acid Solutions ◽  
Natural Materials ◽  
Coconut Fibers
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