Benzidine method for determination of acetic acid in lead acetate

1931 ◽  
Vol 3 (4) ◽  
pp. 379-381 ◽  
Author(s):  
John E. S. Han ◽  
T. L. Chu
Keyword(s):  
Acetic Acid ◽  
Lead Acetate

THE DETERMINATION OF ERGOTHIONEINE IN SIMPLE SOLUTION AND IN BLOOD

1949 ◽  
Vol 27e (4) ◽  
pp. 230-239 ◽  
Author(s):  
G. Hunter
Keyword(s):  
Acetic Acid ◽  
Human Blood ◽  
Lead Acetate ◽  
Reduced Glutathione ◽  
Simple Solution ◽  
Acetate Solution ◽  
Excess Lead ◽  
Photoelectric Colorimeter ◽  
Lead Acetate Solution

The diazo method of Hunter for the determination of ergothioneine in simple solution has been adapted to the Evelyn photoelectric colorimeter. The application of the method to the determination of ergothioneine in blood is described. Suitable blood filtrates are prepared by deproteinization with standard acetic acid oxalate solutions followed by removal of reduced glutathione with Goulard's lead acetate solution, and removal of excess lead with phosphate. By the method precise recovery is obtained of ergothioneine added to human blood.

Rapid Procedure for Aflatoxin Analysis in Cottonseed Products

1966 ◽  
Vol 49 (4) ◽  
pp. 740-743
Author(s):  
Leonard Stoloff ◽  
Alan Graff ◽  
Harold Rich
Keyword(s):  
Acetic Acid ◽  
Cottonseed Meal ◽  
Lead Acetate ◽  
Aqueous Acetone ◽  
Water Mixture ◽  
Partition Chromatography ◽  
Good Recovery ◽  
Powdered Cellulose ◽  
Rapid Procedure

Abstract A new method for the determination of aflatoxins in cottonseed is presented and compared with two other procedures. This procedure yields good recovery for added aflatoxin, is relatively simple and rapid, and produces relatively clean extracts for TLC. A 75 g sample of ground cottonseed or cottonseed meal is extracted with aqueous acetone, centrifuged to remove solids, treated with lead acetate and acetic acid to precipitate interfering substances, and recentrifuged. An aliquot of the supernatant is mixed with powdered cellulose and packed into a chromatographic column for liquid-liquid partition chromatography. Hexane elutes the lipid materials; the aflatoxins are eluted with a hexane-chloroform mixture. After solvent evaporation, the aflatoxin-containing residue is dissolved in chloroform and chromatographed by TLC. Silica gel is the adsorbent; a benzeneethanol-water mixture is the developing solvent. The aflatoxin content is estimated by comparison with standard aflatoxins.

QUANTITATIVE DETERMINATION OF CURCUMIN IN TURMERIC POWDER AND TURMERIC–HONEY BALL PILLS BY HPLC

2018 ◽  
Vol 8 (4) ◽  
pp. 42-47
Author(s):  
Tien Nguyen Huu ◽  
Tram Le Thi Bao ◽  
Ngoc Nguyen Thi Nhu ◽  
Thang Phan Phuoc ◽  
Khan Nguyen Viet
Keyword(s):  
Acetic Acid ◽  
Gastric Mucosa ◽  
Quantitative Determination ◽  
Mobile Phase ◽  
Curcuma Longa ◽  
Biological Marker ◽  
Hplc Method ◽  
Chromatography Analysis ◽  
Precision And Accuracy

Background: Curcumin is a major ingredient in turmeric (Curcuma longa L., Zingiberaceae), which has important activities such as anti-tumor, anti-inflammatory, antioxidant, anti-ischemia, protection of gastric mucosa etc,. Curcumin can be considered as a biological marker of turmeric and turmeric products. Objectives: Developing an HPLC method for quantification of curcumin in turmeric powder and turmeric - honey ball pills; applying this method for products on the market. Materials and methods: turmeric powder and turmeric - honey ball pills collected in Thua Thien Hue province. After optimization process, the method was validated and applied to evaluate the content of curcumin. Results: The chromatography analysis was performed with: Zorbaz Eclipse XDB-C18 (150 × 4.6 nm; 5 µm); Mobile phase: acetonitril: 2% acetic acid (45:55), Flow rate was kept constant at 1.0 ml/min; Detector PDA (420 nm). The method was validated for the HPLC system compatibility, specificity, linearity range, precision and accuracy; the recovery greater than 98%. Conclusion: The developed HPLC method can determine curcumin in turmeric powder and turmeric - honey ball pills. Key words: Curcumin, turmeric powder, turmeric-honey ball pills, quantitative determination, HPLC

HPLC-UV Method for Determination of Famotidine from Pharmaceutical Products

2018 ◽  
Vol 69 (2) ◽  
pp. 297-299
Author(s):  
Adriana Nita ◽  
Delia Mirela Tit ◽  
Lucian Copolovici ◽  
Carmen Elena Melinte (Frunzulica) ◽  
Dana Maria Copolovici ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Quantitative Analysis ◽  
Linear Response ◽  
Mobile Phase ◽  
Acetic Acid Solution ◽  
Pharmaceutical Products ◽  
Quantification Limit ◽  
Validation Parameters ◽  
Hplc Analyses

The aim of this study was to develop and validate a rapid, accurate, and exact method for the quantitative determination of famotidine in pharmaceutical products. The HPLC analyses were performed by using a mobile phase containing methanol:1% acetic acid solution=30:7 (v/v), at a flow rate of 0.4 mL/min.The total time of the method was 10 min, and the retention time of famotidine was 4.16 min. The detection was evaluated at l=267 nm. The method has been validated by using different validation parameters. The linear response of the detector for famotidine peak area was observed at concentrations ranging from 0.1 to 0.0001 mg mL-1 , resulting in a correlation coefficient of 0.99998. The values of the detection limit and of the quantification limit are 0.00048 mg mL-1 and 0.00148 mg mL-1, respectively. The method proposed allowed accurate (with a relative error of less than 2%) and precise (RSD values less than 2.0%) determination of famotidine content in pharmaceutical products and can be used for its rapid quantitative analysis.

THE SYSTEM LEAD ACETATE, ACETIC ACID, WATER1

1932 ◽  
Vol 54 (12) ◽  
pp. 4537-4544 ◽  
Author(s):  
Grady Tarbutton ◽  
Warren C. Vosburgh
Keyword(s):  
Acetic Acid ◽  
Lead Acetate

Micro-determination of pyrrole derivatives with N-bromosuccinimide in acetic acid medium

The Analyst ◽  
1976 ◽  
Vol 101 (1208) ◽  
pp. 867
Author(s):  
J. P. Sharma ◽  
V. K. S. Shukla ◽  
A. K. Dubey
Keyword(s):  
Acetic Acid ◽  
Acid Medium ◽  
Acetic Acid Medium ◽  
Pyrrole Derivatives
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