Determination of trace amounts of phosphate in water samples by ion-exchange resin thin-layer spectrophotometry

The Analyst ◽  
1986 ◽  
Vol 111 (6) ◽  
pp. 685 ◽  
Author(s):  
Kiichi Matsuhisa ◽  
Kunio Ohzeki
Keyword(s):  
Ion Exchange ◽  
Thin Layer ◽  
Water Samples ◽  
Exchange Resin ◽  
Ion Exchange Resin

Fluorometric Determination of Chlortetracycline in Mixed Feeds

1964 ◽  
Vol 47 (2) ◽  
pp. 203-208
Author(s):  
Stanley E Katz ◽  
Joseph Spock
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ammonium Hydroxide ◽  
Solvent System ◽  
Ion Exchange Resin ◽  
Alkaline Degradation ◽  
Fluorometric Determination ◽  
Mixed Feeds ◽  
Microbiological Assays

Abstract The fluorometric procedure for chlortetracycline in mixed feeds is based upon the degradation of chlortetracycline in alkaline solution to isochlortetracycline. The fluorescence of the isochlortetracycline is directly proportional to the concentration of chlortetracycline present prior to alkaline degradation. Chlortetracycline is extracted from mixed feeds with an acidmethanol solvent system, separated from the feed extract by adsorption on a Dowex 50 ion exchange resin, and eluted from the resin by ammonium hydroxide after conversion to isochlortetracycline. The isochlortetracycline is measured fluorometrically. Recoveries from known feeds are generally greater than 90% and agreements with microbiological assays are very close.

Determination of cadmium(II) with a carbon paste electrode modified with an ion-exchange resin

The Analyst ◽  
1989 ◽  
Vol 114 (3) ◽  
pp. 397-399 ◽  
Author(s):  
Lucas Hernández ◽  
Jose M. Melguizo ◽  
Manuel H. Blanco ◽  
Pedro Hernández
Keyword(s):  
Ion Exchange ◽  
Carbon Paste Electrode ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Carbon Paste ◽  
Paste Electrode

Determination of radium in water by liquid scintillation counting after preconcentration with ion-exchange resin

1984 ◽  
Vol 56 (4) ◽  
pp. 761-763 ◽  
Author(s):  
Hideo. Higuchi ◽  
Masaki. Uesugi ◽  
Kaneaki. Satoh ◽  
Naoyuki. Ohashi ◽  
Masayasu. Noguchi
Keyword(s):  
Ion Exchange ◽  
Liquid Scintillation Counting ◽  
Liquid Scintillation ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Scintillation Counting

Determination of serotonin in tissues using an ion-exchange resin

1964 ◽  
Vol 9 (5) ◽  
pp. 427-433 ◽  
Author(s):  
Virginia E. Davis ◽  
J.A. Huff ◽  
H. Brown
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin

Improved thin-layer chromatographic method in the diagnosis of mannosidosis.

1978 ◽  
Vol 24 (9) ◽  
pp. 1576-1577 ◽  
Author(s):  
R B Friedman ◽  
M A Williams ◽  
H W Moser ◽  
E H Kolodny
Keyword(s):  
Ion Exchange ◽  
Thin Layer ◽  
Silica Gel ◽  
Urine Sample ◽  
Chromatographic Method ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Charged Species ◽  
Disease States ◽  
Mixed Bed Ion Exchange

Abstract An improved thin-layer chromatographic method is described for the facile separation of neutral oligosaccharides excreted in the urine of patients with mannosidosis. The urine sample is treated with mixed-bed ion-exchange resin to remove charged species. The eluate is then chromatographed on silica gel thin-layer plates with n-propanol water as the developer. Eleven unique orcinol-positive components can thus be resolved. The advantages of this method over previously described techniques are the ease and rapidity of assay, better resolution of components, and clarity of resolution. It should be applicable to other disease states in which distinctive neutral carbohydrate products are produced.

Sign in / Sign up

Export Citation Format

Share Document