scholarly journals Oxidimetric determination of oxalic acid, malonic acid, tartaric acid, citric acid, and salicylic acid with manganic pyrophospahte

1959 ◽  
Vol 8 (6) ◽  
pp. 380-382 ◽  
Author(s):  
Masayoshi ISHIBASHI ◽  
Tsunenobu SHIGEMATSU ◽  
Shozo SHIBATA
Keyword(s):  
Salicylic Acid ◽  
Citric Acid ◽  
Oxalic Acid ◽  
Tartaric Acid ◽  
Malonic Acid

scholarly journals Separation and Determination of Some Organic Acids in Dry Calyces of Iraqi Hibiscus Sabdariffa Linn

2015 ◽  
Vol 12 (2) ◽  
pp. 340-349
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Citric Acid ◽  
Oxalic Acid ◽  
Organic Acids ◽  
Formic Acid ◽  
Succinic Acid ◽  
Tartaric Acid ◽  
Malic Acid ◽  
Limit Of Detection

A new reversed phase- high performance liquid chromatographic (RP-HPLC) method with Ultraviolet-Visible spectrophotometry has been optimized and validated for the simultaneous extraction and determination of organic acids present in Iraqi calyces of Hibiscus Sabdraffia Linn. The method is based on using ultrasonic bath for extracting organic acids. Limit of detection in µg/ml of Formic acid, Acetic acid, Oxalic acid, Citric acid, Succinic acid, Tartaric acid, and Malic acid 126.8498×10-6, 113.6005×10-6, 97.0513×10-6, 49.7925×10-6, 84.0753×10-6, 92.6551×10-6, and 106.1633×10-6 ,respectively. The concentration of organic acids found in dry spacemen of calyces of Iraqi Hibiscus Sabdraffia Linn. under study: Formic acid, Acetic acid, Oxalic acid, Citric acid, Succinic acid, Tartaric acid, and Malic acid are 114.896 µg/g, 64.722 µg/g, 342.508 µg/g, 126.902 µg/g, 449.91 µg/g, 268.52 µg/g, and 254.07 µg/g respectively.

Darstellung, Schwingungsspektren und Normalkoordinatenanalysen der Dioxoosmate(VI) trans-[OsO2(CN)2(ox)]2-, transs-[OsO2(CN)2(mal)]2- und trans-[OsO2(CN)2(N2H2C2O2)]2- / Synthesis, Vibrational Spectra and Normal Coordinate Analysis of the Dioxoosmates(VI) frans-[OsO2(CN)2(ox)]2- , trans-[OsO2 (CN)2(mal)]2- and trans-[OsO2 (CN)2(N2H2C2O2)]2-

1999 ◽  
Vol 54 (9) ◽  
pp. 1116-1121
Author(s):  
A. Strueß ◽  
W. Preetz
Keyword(s):  
Aqueous Solution ◽  
Oxalic Acid ◽  
Raman Spectra ◽  
Malonic Acid ◽  
Vibrational Spectra ◽  
Room Temperature ◽  
Normal Coordinate ◽  
X Ray ◽  
Ir And Raman

By careful acidification of the aqueous solution of trans-K2[OsO2(OH)4] in the presence of the required amount of cyanide ions with oxalic acid, malonic acid or oxamide the osmyl complexes trans-[OsO2(CN)2(ox)]2- (1), trans-[OsO2(CN)2(mal)]2- (2) und trans-[OsO2(CN)2(N2H2C2O2)]2- (3) are formed. The IR and Raman spectra of the (n-Bu4N) and (Et4N) salts of 1, 2 und 3 were measured at room temperature. Based on the molecular parameters of the X-ray determination of related complexes normal coordinate analyses have been performed and the vibrations were assigned. The valence force constants are fd(C≡N ) = 16.95, fd(Os=O) = 6.68 - 6.70, fd(Os-O) = 2.55 - 2.60, fd(Os-C) = 2.55 and fd(Os-N) = 2.30 mdyn/Å. For the chelate ligands, fd(C =0) ranges from 11.03 - 11.15, fd(C-O/N) from 4.86 - 5.05 and fd(C-C) from 4.07 - 4.70 mdyn/Å.

Determination of Tartaric Acid and the Sum of Malic and Citric Acids in Grape Juices by Potentiometric Titration

1988 ◽  
Vol 71 (5) ◽  
pp. 1028-1032
Author(s):  
Oswaldo E S Godinho ◽  
Nilson E Desouza ◽  
Luiz M Aleixo ◽  
Ari U Ivaska
Keyword(s):  
Citric Acid ◽  
Tartaric Acid ◽  
Potentiometric Titration ◽  
Malic Acid ◽  
Grape Juice ◽  
Algebraic Method ◽  
The Individual ◽  
Grape Juices ◽  
Linear Algebraic Method

Abstract Application of a linear algebraic method to the potentiometric titration of a mixture of tartaric and malic acids makes it possible to determine the individual concentrations of both acids in the same sample. These 2 acids have also been determined in grape juice free of citric acid after their separation from the juice matrix by precipitation as barium salts, followed by selective solubilization. It is also possible to determine tartaric acid and the sum of malic acid and citric acid in grape juice when the latter is present.

scholarly journals Use of tartaric acid–citric acid–sucrose as chemical modifier for the determination of lead in several matrices employing ET AAS

2016 ◽  
Vol 126 ◽  
pp. 368-372 ◽  
Author(s):  
Ariana M.S. Lima ◽  
Dominique G.G.R. Araújo ◽  
Sérgio L.C. Ferreira
Keyword(s):  
Citric Acid ◽  
Tartaric Acid ◽  
Chemical Modifier

Simultaneous chemiluminescence determination of citric acid and oxalic acid using multi-way partial least squares regression

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29214-29221 ◽  
Author(s):  
Ali Mokhtari ◽  
Mohsen Keyvanfard ◽  
Iraj Emami
Keyword(s):  
Citric Acid ◽  
Oxalic Acid ◽  
Least Squares ◽  
Simultaneous Determination ◽  
Partial Least Squares ◽  
Partial Least Squares Regression ◽  
Least Squares Regression ◽  
Chemiluminescent Method

A novel kinetic chemiluminescent method proposed for the simultaneous determination of oxalic acid and citric acid in their mixtures.

The Variation of Bioactive Components in Rosemary Extracts by Adding Organic Acid Synergists

2011 ◽  
Vol 396-398 ◽  
pp. 1475-1479
Author(s):  
Da Wei Li ◽  
Liang Wu Bi ◽  
Zhen Dong Zhao ◽  
Dong Mei Li ◽  
Yan Gu ◽  
...  
Keyword(s):  
Citric Acid ◽  
Oxalic Acid ◽  
Organic Acid ◽  
Tartaric Acid ◽  
High Performance ◽  
Extraction Efficiency ◽  
Carnosic Acid ◽  
Bioactive Components ◽  
Bioactive Component ◽  
Efficiency Improve

A study to track and detect the variation of bioactive components in rosemary extraction solution and extracts, by adding organic acid synergists, such as citric acid, oxalic acid and tartaric acid, was performed using high performance liquid chromatography (HPLC). Ultrasound was also used to increase the extraction efficiency, improve the yields of rosemary extracts and shorten the extraction time. The experimental results showed that the content of the key bioactive component carnosic acid was easier to reduce during the storage of extraction solution and extracts, meanwhile, adding citric acid, oxalic acid and tartaric acid during the extraction could actually slow down the trend of the reduction of the bioactive components, especially for carnosic acid.

scholarly journals The Contents of Organic Acids of Natural Vegetable and Fruit Fermentation Broth

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 761-761
Author(s):  
Miao Li ◽  
Kai Li ◽  
Hao Song
Keyword(s):  
Acetic Acid ◽  
Lactic Acid ◽  
Citric Acid ◽  
Oxalic Acid ◽  
Organic Acids ◽  
Succinic Acid ◽  
Tartaric Acid ◽  
Fermentation Broth ◽  
Natural Fermentation ◽  
Vegetables And Fruits

Abstract Objectives The natural fermentation broth of vegetables and fruits is produced by anaerobic fermentation of vegetables and fruits, so as to form a fermentation beverage with complex components. Some components in the fermentation broth can promote digestion and absorption, alleviate constipation and beautify the face. Fruit and vegetable fermentation can be added into baking products to make natural yeast bread with good flavor and long shelf life. The fermentation broth has broad market application prospects. The contents of organic acids may play an important role in the flavor and nutrition of the natural fermentation broth of vegetables and fruits, which are still under researching. Methods HPLC (High Performance Liquid Chromatography) was used to detect the contents of several kinds of organic acids, such as acetic acid, lactic acid, oxalic acid, citric acid, succinic acid, tartaric acid. Results The contents of acetic acid, lactic acid, oxalic acid, citric acid, succinic acid, tartaric acid in compound natural fermentation broth (grapefruit + apple + lemon) was 5.650 mg/mL, 0.171 mg/mL, 0.013 mg/mL, 0.213 mg/mL, 0.763 mg/mL, 0.628 mg/mL. Conclusions The contents of organic acids were significantly different among different natural fermentation liquors of vegetables and fruits due to different raw materials, formulations and fermentation time. Funding Sources Beijing Yiqing Holding Co., Ltd.

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