Antihistamines Combined with Phenylephrine Hydrochloride and Codeine Phosphate or Dihydrocodeinone Bitartrate in Elixirs

1964 ◽  
Vol 47 (3) ◽  
pp. 475-476
Author(s):  
Rupert Hyatt
Keyword(s):  
Gas Chromatography ◽  
Column Chromatography ◽  
Codeine Phosphate ◽  
Spectrophotometric Measurement ◽  
Phenylephrine Hydrochloride

Abstract A procedure has been developed for analysis of combinations of antihistamines with phenylephrine hydrochloride and codeine phosphate or dihydrocodeinone in cough sirup. The method involves separation by partition column chromatography and determination by spectrophotometric measurement, or by gas chromatography when more than one antihistamine is present. Recoveries from known mixtures were 99— 100.5% of the three ingredients.

Chemical Identification of Meat

1966 ◽  
Vol 49 (4) ◽  
pp. 877-880
Author(s):  
H R Cook ◽  
John D Sturgeon
Keyword(s):  
Gas Chromatography ◽  
Unsaponifiable Matter ◽  
Column Chromatography ◽  
Chemical Identification

Abstract Horse, pork, and beef fat are identified by gas chromatography of the unsaponifiable matter which is first fractionated by column chromatography. Fractions two and three give peaks which identify the fats.

The Effect of Various UHT Processing Parameters and Storage Conditions on the Saturated Aldehydes In Half-and-Half Cream

1991 ◽  
Vol 54 (2) ◽  
pp. 109-112 ◽  
Author(s):  
R.K. HUTCHENS ◽  
A.P. HANSEN
Keyword(s):  
Gas Chromatography ◽  
High Temperature ◽  
Column Chromatography ◽  
Steam Injection ◽  
Processing Parameters ◽  
Storage Conditions ◽  
Tetra Pak ◽  
And Storage ◽  
Ultra High Temperature

Raw cream was standardized to 10% fat and processed by ultra-high-temperature (UHT) steam injection at 149°C for 20 s, 149°C for 3.4 s, 138°C for 20 s, and 143°C for 7 s, then aseptically packaged by a Tetra Pak AB3-250 filler. Packages were stored for 12 months at 24°C and analyzed at 0, 1, 3, 6, and 12 months. Fat-soluble carbonyls were extracted from the UHT cream with carbonyl-free hexanes and converted to their 2,4-dinitrophenyl-hydrazone derivatives. Alkanal hydrazones were separated by column chromatography into pure fractions. Spectrophotometry and gas chromatography were used to identify the alkanals. Butanal, hexanal, heptanal, nonanal, and decanal were identified and found to decrease in concentration during storage.

Chromatographic Separation and Spectrophotometry Determination of Phenylephrine Hydrochloride, Codeine Phosphate, and Some Other Pharmaceuticals in a Mixture

1966 ◽  
Vol 49 (3) ◽  
pp. 536-541
Author(s):  
Donald J Smith
Keyword(s):  
Chromatographic Separation ◽  
Codeine Phosphate ◽  
Hydrocortisone Acetate ◽  
Chlorpheniramine Maleate ◽  
Phenylephrine Hydrochloride ◽  
Phenylpropanolamine Hydrochloride

Abstract Codeine phosphate, chlorpheniramine maleate, pyrilamine maleate, phenylpropanolamine hydrochloride, and hydrocortisone acetate were analyzed in samples containing phenylephrine hydrochloride. A series of four columns is used to separate the various pharmaceutical components prior to analysis. Assays of commercial samples ranged from 87.2 to 118% of declared content.

EFFECT OF STEREOCHEMISTRY IN ANIONIC POLYMERIZATION MODIFIERS

2017 ◽  
Vol 90 (2) ◽  
pp. 325-336
Author(s):  
Terrence E. Hogan ◽  
Waruna Kiridena ◽  
Laura Kocsis
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
1H Nmr ◽  
Column Chromatography ◽  
Anionic Polymerization ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

ABSTRACT The influence of stereochemistry of polar modifiers on the microstructure of polybutadiene and poly(styrene-co-butadiene) was evaluated for 2,2′-ditetrahydrofurylpropane (DTHFP). The meso and d,l diastereomers were isolated from commercial 50/50 mixtures through column chromatography and characterized by 1H-NMR and gas chromatography/mass spectrometry. The meso-DTHFP was found to be more active than d,l-DTHFP in incorporation of vinyl during anionic polymerization. To form a polymer with approximately 55% vinyl, twice the amount of d,l-DTHFP was required compared with using pure meso-DTHFP. The mechanism for this effect will be discussed.

Identification of Antioxidants, Accelerators and Plasticizers in Rubber Compounds by Column Chromatography and Ultraviolet and Infrared Spectrophotometry

1968 ◽  
Vol 41 (3) ◽  
pp. 630-637 ◽  
Author(s):  
A. Fiorenza ◽  
G. Bonomi ◽  
A. Saredi
Keyword(s):  
Gas Chromatography ◽  
Thin Layer ◽  
Column Chromatography ◽  
Infrared Spectrophotometry ◽  
Ultraviolet Detector ◽  
Rubber Compounds ◽  
Ir Spectrophotometry ◽  
Suitable Reference ◽  
Layer Chromatography ◽  
Reference Samples

Abstract This paper deals with separation of antioxidants, accelerators, and plasticizers in rubber compounds by column chromatography. The chromatographic diagrams obtained by a special ultraviolet detector and the spectra of the various fractions obtained from the extracts of eleven compounds are reported. With suitable reference samples, many other antioxidants and some other accelerators can be identified in addition to those tested in the present work. The identification of the components of the extract is improved examining the fractions also by IR spectrophotometry, employing either the technique of NaCl plates or, better, that of KBr pellets. Other very useful auxiliary techniques are paper and thin layer chromatography and gas chromatography.

Differentiation Between Natural Hydrocarbons and Low Level Diesel Oil Contamination in Cooked Lobster Meat

1975 ◽  
Vol 32 (2) ◽  
pp. 316-320 ◽  
Author(s):  
M. Paradis ◽  
R. G. Ackman
Keyword(s):  
Gas Chromatography ◽  
Column Chromatography ◽  
Lipid Extraction ◽  
Diesel Oil ◽  
Extraction Column ◽  
Oil Contamination ◽  
Low Level ◽  
Total Lipid Extraction ◽  
Temperature Programmed ◽  
Normal Background

A combination of total lipid extraction, column chromatography, and temperature-programmed gas chromatography was required to demonstrate disputed low level diesel oil contamination in cooked lobster meat. A specific diesel oil contaminant was indicated but identifiable components were not greatly in excess of the same compounds which were also found to be a normal background in organoleptically acceptable canned lobster meat.

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