Pharmaceutical

07 06 2005Obtained solid pharmaceutical-grade ferric citrate may be mixed with alcohol and filtered the mixture one or more times to remove residual quantities of solid ferric salt citric acid and by-products to improve the purity of solid pharmaceutical-grade ferric citrate

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Ion

The secondary citric acid peak results from two species of citric acid existing at pH 3 0 Finally succinic acid was eluted last in this mixture because it is the most hydrophobic and has the highest pK a The selectivity factors for peak pairs citric/malic acid and succinic/citric acid were estimated to be 2 5 and 1 8 respectively

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Simple and Rapid Method for Analysis of Oxytetracycline as

Biomedicals LLC Germany Methanol Acetonitril ortho phosphoric acid Trichloroacetic acid and diethyl-amin of HPLC grade (sigma aldrich Ger-many) Monopotassium phosphate and citric acid Extra pure (Scharlau Spain) Deionized water and Solvents of LC grade was obtained by filtering through

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JPP 2018 7(6): 611

~ 613 ~ Journal of Pharmacognosy and Phytochemistry Fig 2: Comparative chromatograms of test mixture (Isocratic evaluation mix): Left panel-reference Right panel-test evaluation HPLC method validation and quantification of organic acids A total of 12 standard organic acids viz oxalic acid D- tartaric acid D-malic acid malonic acid maleic acid citric

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POLYVINYL ALCOHOL (PVA)

Acetic acid standard (99%) Citric acid standard (99%) Deionized water (HPLC grade) Procedure Mobile phase 0 50 g/l solution of sulfuric acid Preparation of internal standard solution Accurately weigh about 30 mg of citric acid and dilute to 100 ml with mobile phase in a volumetric flask Preparation of standard solution

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PAGE 1 OF 10 DATE: MARCH 2013

PAGE 1 OF 10 DATE: MARCH 2013 METHOD: RTETE 025 DETERMINATION OF TETRACYCLINES IN EGGS 1 INTRODUCTION Tetracyclines are a common antibiotic used in poultry production Tetracyclines are extracted from eggs with EDTA-McIlvaine buffer pH 4 0 and cleaned up by tandem solid phase extraction with C18 and PRS SPE columns The eluate is analyzed by HPLC

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Journal of Analytical Methods in Chemistry

It is now well-established that perturbations in the tricarboxylic acid (TCA) cycle play an important role in the metabolic transformation occurring in cancer including that of the prostate A method for simultaneous qualitative and quantitative analysis of TCA cycle intermediates in body fluids tissues and cultured cell lines of human origin was developed using a common C18 reversed

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FLAVONOID AND ORGANIC ACID CONTENT IN ROSE HIPS

bic acid were 0 18 and 0 06 mg/L respectively and 7 41 and 2 47 mg/L for citric acid All solvents used were HPLC grade (Merck) Reference standards were obtained from Sigma-Aldrich STATISTICAL ANALYSIS Statistica 7 1 (StatSoft 2005) was used for statisti-cal calculations The Kruskal-Wallis test and the median test as well as post-hoc

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High Quality Citric acid hydrate CasNo 5949

High Quality Citric acid hydrate 5949-29-1 Suppliers provide High Quality Citric acid hydrate 5949-29-1 product and the products related with China (Mainland) High Quality Citric acid hydrate 5949-29-1 Qingdao Sigma Chemical Co Ltd China (Mainland)

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Simple and Rapid Method for Analysis of Oxytetracycline as

Biomedicals LLC Germany Methanol Acetonitril ortho phosphoric acid Trichloroacetic acid and diethyl-amin of HPLC grade (sigma aldrich Ger-many) Monopotassium phosphate and citric acid Extra pure (Scharlau Spain) Deionized water and Solvents of LC grade was obtained by filtering through

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Comparison of antioxidative and synergistic effects of

It can chelate metal ions by forming bonds between the metal and the carboxyl or hydroxyl groups of the citric acid molecule (Anon 1985) Citric acid is very effective in retarding the oxidative deterioration of lipids in foods and is commonly added to vegetable oils after deodorisation (Gordon 1990)

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CITRIC ACID

CITRIC ACID-BASED DEEP EUTECTIC SOLVENTS: PHYSICAL PROPERTIES AND THEIR USE AS COSOLVENTS IN SULPHURIC ACID-CATALYSED ETHANOLYSIS OF OLEIC ACID Dragan Z Troter 1* Milica Z Zlatković1 Dušica R Đokić-Stojanović2 Sandra S Konstantinović 1 Zoran B Todorović 1 Faculty of Technology University of Niš Leskovac Serbia

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Journal of Analytical Methods in Chemistry

Journal of Analytical Methods in Chemistry / 2015 Germany) orthophosphoric acid (Merck Darmstadt Germany) acetonitrile (ACN) gradient grade (Sigma-Aldrich Steinheim Germany) methanol (MeOH) gradient grade (Sigma-Aldrich Steinheim Germany) and tetrahydrofuran (THF) Chromasolv (Sigma-Aldrich Steinheim Germany) were used to prepare the mobile

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Citric acid production from orange peel wastes by solid

Citric acid (CA) an intermediate of the tricarboxylic acid cycle is found in a variety of acidic fruit juices particularly in the citric ones although its extraction from natural sources primarily lemon was gradually replaced by biological procedures mainly based on the use of microfungi which are currently the most widely used

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Water HPLC Grade

Cannabichromenic Acid (CBCA) Cannabichromeorcin (CBCO) Cannabichromevarin (CBCV) Cannabicitran (CBT) Cannabicyclol (CBL) Cannabicyclolic Acid (CBLA) Cannabidiol (CBD) Cannabidiolic Acid (CBDA) Cannabidivarin (CBDV) Cannabidivarinic Acid (CBDVA) Cannabigerol (CBG) Cannabigerolic Acid (CBGA) Cannabinol (CBN) Cannabinolic Acid

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A Biodegradable Thermoset Polymer Made by

A new biomaterial a degradable thermoset polymer was made from simple economical biocompatable monomers without the need for a catalyst Glycerol and citric acid non-toxic and renewable reagents were crosslinked by a melt polymerization reaction at

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A Guide to HPLC and LC

5 additives are listed in Table 1 A buffer is most effective when used within 1 pH unit of its pKa but may provide adequate buffering 2 pH units from the pKa Table 1 pKa Values of Common Mobile Phase Additives1 The most popular buffers for HPLC with UV detection are phosphate and

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