scholarly journals Determination of Polymeric Aluminum in Soil Extracted with a Modified Anion-Exchange Resin as a Solid-Phase Adsorbent by ICP-AES

2004 ◽  
Vol 20 (1) ◽  
pp. 95-100 ◽  
Author(s):  
Mingbiao LUO ◽  
Shuping BI ◽  
Chenyi WANG ◽  
Junzhong HUANG
Keyword(s):  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Solid Phase

scholarly journals Flow injection spectrophotometric determination of adrenaline using a solid-phase reactor containing triiodide ions immobilized in an anion-exchange resin

2004 ◽  
Vol 29 (1) ◽  
pp. 79-84 ◽  
Author(s):  
H. J. Vieira ◽  
O. Fatibello-Filho
Keyword(s):  
Anion Exchange ◽  
Flow Injection ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Solid Phase ◽  
Pharmaceutical Products ◽  
Three Samples ◽  
Solid Phase Reactor ◽  
On Line

A flow injection spectrophotometric procedure with on-line solid-phase reactor containing ion triiodide immobilized in an anion-exchange resin is proposed for the determination of adrenaline (epinephrine) in pharmaceutical products. Adrenaline is oxidized by triiodide ion immobilized in an anionic-exchange resin yielding adrenochrome which is transported by the carrier solution and detected at a wavelength of 488 nm. Adrenaline was determined in three pharmaceutical products in the 6.4 x 10-6 to 3.0 x 10-4 mol L-1 concentration range with a detection limit of 4.8 x 10-7 mol L-1. The recovery of this analyte in three samples ranged from 96.0 to 105 %. The analytical frequency was 80 determinations per hour and the RSDs were less than 1 % for adrenaline concentrations of 6.4 x 10-5 and 2.0 x 10-4 mol L-1 (n=10). A paired t-test showed that all results obtained for adrenaline in commercial formulations using the proposed flow injection procedure and a spectrophotometric batch procedure agree at the 95% confidence level.

Quantitative Determination of FD&C Colors in Foods

1975 ◽  
Vol 58 (2) ◽  
pp. 278-282
Author(s):  
Charles Graichen
Keyword(s):  
Quantitative Determination ◽  
Anion Exchange ◽  
Salt Solution ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Collaborative Study ◽  
Chromatographic Technique ◽  
Different Color ◽  
Selection Of

Abstract A published procedure using Amberlite LA-2 (a liquid anion exchange resin) solutions to extract colors from food and the salt solution cellulose chromatographic technique to separate colors from each other were updated and submitted to collaborative study. Three batches of cookies and 4 purchased products were analyzed by 13 collaborators. The 3 batches of cookies contained different color mixtures requiring the selection of various procedures. The 4 purchased products were selected principally to include a variety of foods. Some results were partially deficient. The deficiencies reflect certain inadequacies in the directions as written rather than basic flaws in the method. Some improvements were suggested by the collaborators. The Associate Referee recommends that the method be further revised to correct the present inadequacies and to include some improvements, and that the revised method be submitted to another collaborative study.

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