Separation and determination of vitamin B1, B2, B6 and nicotinamide in commercial vitamin preparations using high performance cation-exchange chromatography

1974 ◽  
Vol 7 (11) ◽  
pp. 644-650 ◽  
Author(s):  
K. Callmer ◽  
L. Davies
Keyword(s):  
Cation Exchange ◽  
High Performance ◽  
Vitamin B1 ◽  
Exchange Chromatography ◽  
Cation Exchange Chromatography

Determination of melamine derivatives, melame, meleme, ammeline and ammelide by high-performance cation-exchange chromatography

1998 ◽  
Vol 815 (2) ◽  
pp. 197-204 ◽  
Author(s):  
Shin Ono ◽  
Tatsuo Funato ◽  
Yasuhiko Inoue ◽  
Tetsue Munechika ◽  
Toshiaki Yoshimura ◽  
...  
Keyword(s):  
Cation Exchange ◽  
High Performance ◽  
Exchange Chromatography ◽  
Cation Exchange Chromatography

Determination of Taurine in Infant Formulas Using Ultrafiltration and Cation-Exchange Chromatography

1990 ◽  
Vol 73 (4) ◽  
pp. 627-631
Author(s):  
Edgar C Nicolas ◽  
Kathleen A Pfender ◽  
Michael A Aoun ◽  
Jane E Hemmer
Keyword(s):  
Human Milk ◽  
Cation Exchange ◽  
High Performance ◽  
Exchange Chromatography ◽  
Infant Formulas ◽  
Citrate Buffer ◽  
Simple Method ◽  
Cation Exchange Column ◽  
Chromatographic Resolution

Abstract A fast and simple method for determination of taurine in Infant formulas has been developed. The sample preparation uses disposable ultrafiltration cartridges to remove protein and clarify the sample. Hydrolysis Is avoided, simplifying the procedure and increasing efficiency. One mL sample Is centrlfuged In a cartridge for 45 mln. The filtrate Is diluted with pH 2.2 citrate buffer and Injected into a high performance amino acid analyzer. A cation-exchange column (sodium phase) Is used with a single buffer eluant and an Isocratic chromatographic program. Colorimetrlc detection is performed following post-column nlnhydrln reaction. Chromatographic resolution from other nlnhydrln-posltive compounds is excellent. Average recoveries for 3 levels of spike for various products were 100-102%. Precision Is 1-3% RSD, depending on product. Linearity, specificity, and ruggedness are excellent. The method Is applicable to quality control testing of milk-based, soy-based, and prehydrolyzed proteinbased Infant formulas In the ready-to-use, concentrate, and powder forms. A variety of commercially available Infant formulas from different manufacturers were analyzed and all were found to contain taurine levels comparable to human milk. Some human milk and cow's milk samples were also analyzed and results compare well with literature values

Effect of temperature on quantifying glycated (glycosylated) hemoglobin by cation-exchange chromatography.

1985 ◽  
Vol 31 (1) ◽  
pp. 114-117 ◽  
Author(s):  
R Flückiger ◽  
T Woodtli
Keyword(s):  
Ionic Strength ◽  
Cation Exchange ◽  
High Performance ◽  
Glycated Hemoglobin ◽  
Operating Temperature ◽  
Glycosylated Hemoglobin ◽  
Regression Line ◽  
Exchange Chromatography ◽  
Effect Of Temperature ◽  
Cation Exchange Chromatography

Abstract As a consequence of nonideal chromatographic conditions, values for stable glycated hemoglobin (HbA1c) determined by cation-exchange chromatography in a commercial minicolumn system (y) or by "high-performance" liquid chromatography (x) differ markedly, yielding the regression line y = 0.82x + 0.6. With use of the protocol specified by the manufacturer, 20% of the HbA1c peak is not collected in the HbA1c fraction. Increasing the ionic strength of the eluting buffer by increasing the operating temperature to 28 degrees C increases the rate of elution from the minicolumn, making results of the two methods more closely comparable (y = 0.98x - 0.22). Because at a given pH the elution volume is determined primarily by the ionic strength, close limits on the composition of the eluting buffer are set by the temperature-dependence of its ionic strength. At a specified temperature and pH the position of a peak can be judged to within a volume of 1 mL if the conductivity of the eluent does not vary by more than +/- 0.05 mS.

Inductively coupled plasma mass spectrometry coupled to cation exchange chromatography for the determination of trace nickel in alkaline electrolyte

2020 ◽  
Vol 35 (7) ◽  
pp. 1295-1299
Author(s):  
Lukas Miner ◽  
Diane Beauchemin
Keyword(s):  
Mass Spectrometry ◽  
Cation Exchange ◽  
Inductively Coupled Plasma ◽  
Exchange Chromatography ◽  
Alkaline Solutions ◽  
Alkaline Electrolyte ◽  
Cation Exchange Chromatography ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

Cone corrosion by alkaline solutions with flow injection is prevented using cation-exchange chromatography coupled to inductively coupled plasma mass spectrometry.

High-performance ion-exclusion/cation-exchange chromatography of anions and cations in acid rain waters on a weakly acidic cation-exchange resin

2001 ◽  
Vol 920 (1-2) ◽  
pp. 239-245 ◽  
Author(s):  
Kazuhiko Tanaka ◽  
Kazutoku Ohta ◽  
Paul R Haddad ◽  
James S Fritz ◽  
Akiyashi Miyanaga ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Acid Rain ◽  
High Performance ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Exchange Chromatography ◽  
Cation Exchange Chromatography ◽  
Ion Exclusion ◽  
Anions And Cations
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