Study on Determination of the Content of Fe2+,Fe3+ in Medicine Haematitum with Different Characters

2010 ◽  
Vol 44-47 ◽  
pp. 2111-2115
Author(s):  
Nan Yan Xiong ◽  
Lian We Kang ◽  
Xiao Mei Wang ◽  
Ji Hong Zhou ◽  
Cui Ling Wei
Keyword(s):  
Hydrochloric Acid ◽  
Potassium Fluoride ◽  
Concentration Difference ◽  
Vis Spectroscopy ◽  
Sample Decomposition

Objective: Establishment the iron (Ⅱ), iron (Ⅲ) the content determines separately method in haematitum.Methods: Sample decomposition with hydrochloric acid and potassium fluoride. Determined the content of iron in different characters mineral medicine haematitum by UV-vis spectroscopy, pH3~5, wavelength 396nm；Determined the content of Fe2+, Obtained the content of Fe3+ by concentration difference. Results: This method is easy to do.The accuracy is good.The returns-ratio is high.The method may take the haematitum quality the control standard.

Content Determination of Pb inOcher's Water Decoction and Vinegar Decoction

2011 ◽  
Vol 345 ◽  
pp. 270-275
Author(s):  
Lian Wei Kang ◽  
Nan Yan Xiong ◽  
Xiao Mei Wang
Keyword(s):  
Hydrochloric Acid ◽  
Clinical Application ◽  
Science Instruction ◽  
Potassium Fluoride ◽  
Content Determination ◽  
Vis Spectroscopy ◽  
Sample Decomposition

AIM: Establishment Pb the content determines separately method in ocher's Water decoction and the vinegar decoction. Provide the theory basis and the science instruction for the ocher clinical medication. MET Sample decomposition with hydrochloric acid and potassium fluoride. Determined the content of Pb in different characters mineral medicine haematitum by UV-vis spectroscopy, pH9~10, wavelength 520nm；Determined the content of Pb; .RESULTS It is different to the content of Pb in different characters mineral medicine haematitum. CONCLUSION：It should be differences in the clinical application.

Improved Selenium Recovery from Tissue with Modified Sample Decomposition

1991 ◽  
Vol 74 (3) ◽  
pp. 570-571
Author(s):  
William G Brumbaugh ◽  
Michael J Walther
Keyword(s):  
Hydrochloric Acid ◽  
Biological Tissue ◽  
Decomposition Method ◽  
Small Volume ◽  
Hydride Generation ◽  
Fish Tissue ◽  
Simple Modification ◽  
Modified Method ◽  
Sample Decomposition

Abstract The present paper describes a simple modification of a recently reported decomposition method for determination of selenium In biological tissue by hydride generation atomic absorption. The modified method yielded slightly higher selenium recoveries (3-4%) for selected reference tissues and fish tissue spiked with selenomethionine. Radiotracer experiments indicated that the addition of a small volume of hydrochloric acid to the wet digestate mixture reduced slight losses of selenium as the sample initially went to dryness before ashing. With the modified method, selenium spiked as selenomethionine behaved more like the selenium in reference tissues than did the inorganic spike forms when this digestion modification was used

DETERMINATION OF GLYCOL CONTAMINATION IN ENGINE OIL BY INFRARED AND UV-VIS SPECTROSCOPY

2018 ◽  
Author(s):  
Torrey Holland ◽  
Dennis Watson ◽  
P Sivakumar ◽  
Ali Abdul-Munaim ◽  
Robinson Karunanithy
Keyword(s):  
Engine Oil ◽  
Vis Spectroscopy

Determination of Chitosan Oligosaccharide Content by Acetylacetone Spectrophotometry Method

2012 ◽  
Vol 503-504 ◽  
pp. 543-547 ◽  
Author(s):  
Ze Ping Xu ◽  
Chuan Lun Yang ◽  
Xin Qing Zhang ◽  
Xiu Zhi Wang ◽  
Bao Sheng Huang
Keyword(s):  
Hydrochloric Acid ◽  
Linear Relationship ◽  
Regression Equation ◽  
Common Method ◽  
Chitosan Oligosaccharide ◽  
Average Recovery ◽  
Good Linear ◽  
Good Linear Relationship

Objective: To establish a common method to detect the content of chitosan oligosaccharide. Methods: Chitosan oligosaccharide was hydrolyzed completely by concentrated hydrochloric acid, and the solution was regulated into neutral with NaOH. Then, determined the absorbance in 525nm, and substituted into the regression equation to determine the results. Results: The results showed there was a good linear relationship when the concentration of chitosan oligosaccharide ranged from 0.02 mg/mL to 0.12 mg/mL, r2 = 0.999. The average recovery of chitosan oligosaccharide samples was 99.25%. Conclusion: The method is sensitive, accurate and simple. It is applied to determine of the content of chitosan oligosaccharide.

DETERMINATION OF TRACE AMOUNTS OF SILVER IN GALENA ORES

1960 ◽  
Vol 38 (9) ◽  
pp. 1488-1494 ◽  
Author(s):  
E. J. Bounsall ◽  
W. A. E. McBryde
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Sodium Chloride ◽  
Hydrochloric Acid ◽  
Chloride Solution ◽  
Sodium Chloride Solution ◽  
Silver Content ◽  
Aqueous Sodium Chloride Solution ◽  
Aqueous Sodium

An analytical method is described for the determination of microgram amounts of silver in galena ores, based on the "reversion" of silver dithizonate. Silver is separated from relatively large amounts of lead by extraction as dithizonate into chloroform from an aqueous 1:99 nitric acid solution. Separation from mercury, which is also extracted under these conditions and would, if present, interfere in the analysis, is achieved by reverting the dithizonate solution with a 5% aqueous sodium chloride solution which is also 0.015 molar in hydrochloric acid. Following dilution of this aqueous solution and adjustment of pH, silver is again extracted into chloroform as the dithizonate, and determined absorptiometrically. Analyses of a number of galena ore samples showed a precision of within 3% for a silver content ranging from 0.03 to 0.4%.Some other methods for isolating silver from these samples, which were tried but found unsatisfactory, are discussed.

UV–Vis Spectroscopy Applied in the Determination of the Degradation Time of Abelmoschus esculentus Moench Solution Used as Natural Flocculant

2021 ◽  
Vol 232 (9) ◽  
Author(s):  
Dominique Martins Sala ◽  
Patrícia Valderrama ◽  
Ana Paula Peron ◽  
Flávia Vieira da Silva-Medeiros
Keyword(s):  
Abelmoschus Esculentus ◽  
Vis Spectroscopy ◽  
Degradation Time
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