Determination of the Constants of Affinity of FeCl3, CuCl2, and ZnCl2 for a Nitrogen-Containing Organosilane Bonded on Al2O3–Cellulose Acetate Hybrid Material Surface from Ethanol Solution

2002 ◽  
Vol 254 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Angélica M. Lazarin ◽  
Richard Landers ◽  
Yuriy V. Kholin ◽  
Yoshitaka Gushikem
Keyword(s):  
Cellulose Acetate ◽  
Hybrid Material ◽  
Ethanol Solution ◽  
Material Surface

Quantitative Determination of L-Ascorbic Acid by Gas-Liquid Chromatography

1974 ◽  
Vol 57 (6) ◽  
pp. 1346-1348
Author(s):  
Janis E Schlack
Keyword(s):  
Ascorbic Acid ◽  
Lead Acetate ◽  
Chromatographic Method ◽  
Ethanol Solution ◽  
Lead Salt ◽  
Gas Liquid Chromatography ◽  
Trimethylsilyl Derivative ◽  
Liquid Chromatographic Method ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic method for L-ascorbic acid in foods and food products has been devised. Ascorbic acid is extracted into an ethanol solution, precipitated with lead acetate, regenerated from the lead salt as its trimethylsilyl derivative, and chromatographed on an SE- 30 column. Recoveries averaged 100.1%; the standard deviation was ±0.23%.

Determination of Functional Components of Peanut Skins Pigment

2013 ◽  
Vol 807-809 ◽  
pp. 2035-2042
Author(s):  
Lei Du ◽  
Xin Hua Li ◽  
Ying Liu
Keyword(s):  
Ethyl Acetate ◽  
Chemical Reaction ◽  
Ethanol Solution ◽  
Macroporous Resin ◽  
Visible Spectrophotometry ◽  
Preliminary Identification ◽  
Uv Visible ◽  
Peanut Skins ◽  
Functional Components

The pigments in black and red peanut skins were comparative analyzed in this paper. The pigments were extracted with ethanol solution, purified by AB-8 macroporous resin, and black peanut skins pigment (BPSP) was separated by ethyl acetate to obtain different compositions. The compositions of pigments were qualitatively analyzed by special chemical reaction of organics and UV-visible spectrophotometry. The results show that the compositions of BPSP are mainly anthocyanins and proanthocyanidins, and the contents are 9.39% and 16.62%, respectively. The proanthocyanidins are found in red peanut skins pigment (RPSP), and the content is 24.51%, and no anthocyanin is checked out. It is convenient, rapid, economical and effective for special chemical reaction of organics and UV-visible spectrophotometry, and it is suitable for preliminary identification of natural organics structure.

HPLC determination of mycophenolic acid and mycophenolic acid glucuronide in human plasma with hybrid material

2004 ◽  
Vol 36 (3) ◽  
pp. 649-651 ◽  
Author(s):  
Magali Bolon ◽  
Laetitia Jeanpierre ◽  
Mirna El Barkil ◽  
Karim Chelbi ◽  
Martine Sauviat ◽  
...  
Keyword(s):  
Human Plasma ◽  
Mycophenolic Acid ◽  
Hybrid Material ◽  
Hplc Determination ◽  
Mycophenolic Acid Glucuronide
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