scholarly journals Thin-layer chromatography to monitor cholesterol gallstone dissolution by methyl tert-butyl ether.

1991 ◽  
Vol 157 (1) ◽  
pp. 33-36 ◽  
Author(s):  
H B D'Agostino ◽  
E vanSonnenberg ◽  
C D Schteingart ◽  
A F Hofmann ◽  
G Casola ◽  
...  
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Cholesterol Gallstone ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Gallstone Dissolution ◽  
Tert Butyl ◽  
Layer Chromatography

scholarly journals A solvent mixture of methyl tert-butyl ether with fluorocarbon for cholesterol gallstone dissolution.

1990 ◽  
Vol 23 (4) ◽  
pp. 857-860
Author(s):  
Shigeaki Inoue ◽  
Masaaki Endoh ◽  
Shoichi Shida ◽  
Hiromichi Nakachi ◽  
Mustuo Sasaki ◽  
...  
Keyword(s):  
Cholesterol Gallstone ◽  
Solvent Mixture ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Gallstone Dissolution ◽  
Tert Butyl

scholarly journals A validated quantification of triclosan in toothpaste using high-performance thin-layer chromatography and a 48-bit fatbed scanner

2021 ◽  
Author(s):  
Barbara Anders ◽  
Sabrina Doll ◽  
Bernd Spangenberg
Keyword(s):  
Acetic Acid ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Detection System ◽  
Flatbed Scanner ◽  
Butyl Ether ◽  
Quantification Method ◽  
Direct Measurements ◽  
Layer Chromatography

AbstractWe present a densitometric quantification method for triclosan in toothpaste, separated by high-performance thin-layer chromatography (HPTLC) and using a 48-bit flatbed scanner as the detection system. The sample was band-wise applied to HPTLC plates (10 × 20 cm), with fluorescent dye, Merck, Germany (1.05554). The plates were developed in a vertical developing chamber with 20 min of chamber saturation over 70 mm, using n-heptane–methyl tert-butyl ether–acetic acid (92:8:0.1, V/V) as solvent. The RF value of triclosan is hRF = 22.4, and quantification is based on direct measurements using an inexpensive 48-bit flatbed scanner for color measurements (in red, green, and blue) after plate staining with 2,6-dichloroquinone-4-chloroimide (Gibbs' reagent). Evaluation of the red channel makes the measurements of triclosan very specific. For linearization, an extended Kubelka–Munk expression was used for data transformation. The range of linearity covers more than two orders of magnitude and is between 91 and 1000 ng. The separation method is inexpensive, fast and reliable.

Systemic and local toxicity in the rat of methyl tert-butyl ether: A gallstone dissolution agent

1992 ◽  
Vol 53 (6) ◽  
pp. 572-577 ◽  
Author(s):  
R. Akimoto ◽  
E. Rieger ◽  
A.R. Moossa ◽  
A.F. Hofmann ◽  
H.E. Wahlstrom
Keyword(s):  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Gallstone Dissolution ◽  
Tert Butyl ◽  
Local Toxicity

Gallstone dissolution with methyl-tert-butyl ether via percutaneous cholecystostomy: success and caveats

1986 ◽  
Vol 146 (4) ◽  
pp. 865-867 ◽  
Author(s):  
E vanSonnenberg ◽  
AF Hofmann ◽  
J Neoptolemus ◽  
GR Wittich ◽  
RA Princenthal ◽  
...  
Keyword(s):  
Methyl Tert Butyl Ether ◽  
Percutaneous Cholecystostomy ◽  
Butyl Ether ◽  
Gallstone Dissolution ◽  
Tert Butyl

Increased blood levels of methyl tert-butyl ether but not of ethyl propionate during instillation with contact gallstone dissolution agents in the pig

Hepatology ◽  
1993 ◽  
Vol 18 (2) ◽  
pp. 373-379 ◽  
Author(s):  
Oliver Esch ◽  
Claudio D. Schteingart ◽  
Dirk Pappert ◽  
Diane Kirby ◽  
Rita Streich ◽  
...  
Keyword(s):  
Methyl Tert Butyl Ether ◽  
Blood Levels ◽  
Butyl Ether ◽  
Ethyl Propionate ◽  
Gallstone Dissolution ◽  
Tert Butyl

II. Mitt.: Verhalten in Tomatenpflanzen

1968 ◽  
Vol 23 (6) ◽  
pp. 834-838 ◽  
Author(s):  
Falko Grimmer ◽  
Wolfgang Dedek ◽  
Eberhard Leibnitz
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Alkyl Chain ◽  
Organophosphorus Compounds ◽  
Tomato Plants ◽  
Aqueous Buffer ◽  
Tert Butyl ◽  
Buffer Solutions ◽  
Layer Chromatography ◽  
Radio Thin Layer Chromatography

The metabolism of dimethoate and its N-butyl homologues in tomato plants has been studied by use of 32P and 35S labelled initial products. The preparation of thiol-35S-labelled dimethoate is described. Formation and break down of dimethoxon and N-tert.-butyl-dimethoxon have been measured by radio-thin layer chromatography. The calculated biological half times have been compared with those in aqueous buffer solutions; remarkable differences between dimethoate and dimethoxon derivatives have been observed. The extension of the N-alkyl chain causes a more rapid biological breakdown. The technique described is also useful for the comparison of other organophosphorus compounds (OPC).

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