Effect of chromatographic conditions on resolution in high-performance ion-exchange chromatography of proteins on macroporous anion-exchange resin

2004 ◽  
Vol 1031 (1-2) ◽  
pp. 101-105 ◽  
Author(s):  
Yoshio Kato ◽  
Koji Nakamura ◽  
Takashi Kitamura ◽  
Teruhiko Tsuda ◽  
Masazumi Hasegawa ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
High Performance ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography

Boron isotope separation by ion-exchange chromatography using an anion-exchange resin in halide forms

1988 ◽  
Vol 450 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Takao Oi ◽  
Tetsuro Tsukamoto ◽  
Hideki Akai ◽  
Hidetake Kakihana ◽  
Morikazu Hosoe
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Isotope Separation ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Boron Isotope

False-negative results for urinary phenothiazines and imipramine in Forrest's qualitative assays.

1980 ◽  
Vol 26 (2) ◽  
pp. 345-347 ◽  
Author(s):  
G P James ◽  
M H DJang ◽  
H H Hamilton
Keyword(s):  
Ascorbic Acid ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
False Negative ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Negative Results ◽  
False Negative Results

Abstract When a series of patients' urine samples supplemented in vitro with chlorpromazine or imipramine was assayed with the Forrest qualitative assays, we observed an occasional false-negative result, which we found was attributable to interference by ascorbic acid. It interferes with the reagent, not with the analytes, in both assays. We easily eliminated this interference with the phenothiazine test by using an anion-exchange resin. Eliminating the interference with the assay for imipramine, however, is more difficult; false-negative results can be obtained even after ion-exchange chromatography if the imipramine concentration is less than 50 mg/L.

False-negative results for urinary phenothiazines and imipramine in Forrest's qualitative assays.

1980 ◽  
Vol 26 (2) ◽  
pp. 345-347
Author(s):  
G P James ◽  
M H DJang ◽  
H H Hamilton
Keyword(s):  
Ascorbic Acid ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
False Negative ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Negative Results ◽  
False Negative Results

Abstract When a series of patients' urine samples supplemented in vitro with chlorpromazine or imipramine was assayed with the Forrest qualitative assays, we observed an occasional false-negative result, which we found was attributable to interference by ascorbic acid. It interferes with the reagent, not with the analytes, in both assays. We easily eliminated this interference with the phenothiazine test by using an anion-exchange resin. Eliminating the interference with the assay for imipramine, however, is more difficult; false-negative results can be obtained even after ion-exchange chromatography if the imipramine concentration is less than 50 mg/L.

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