scholarly journals The Influence of Sample pH on the Determination of Selected Carboxylic Acids by Isocratic Ion Chromatography

2021 ◽  
Vol 15 (3) ◽  
pp. 319-323
Author(s):  
Paulina Pecyna-Utylska ◽  
◽  
Tomasz Konieczny ◽  
Rajmund Michalski ◽  
◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Ion Chromatography ◽  
Coal Combustion ◽  
Medium Density ◽  
Chromatography Method ◽  
Ph Changes ◽  
Liquid Samples ◽  
Suppressed Conductivity Detection ◽  
By Products

Validated isocratic ion chromatography method with suppressed conductivity detection has been developed for the simultaneously determination of common inorganic anions (F-, Cl-, NO3-, PO43-, SO42-), as well as formate and acetate. Liquid samples originate from absorption of gaseous by-products from coal combustion with and without the addition of medium-density fireboards. The influence of sample pH changes on carboxylic acids determination has been tested.

Determination of Cl- in Concrete Materials by Ion Chromatography

2016 ◽  
Vol 680 ◽  
pp. 52-55
Author(s):  
Hong Yan Guan ◽  
Jian Jun Ding ◽  
Zhong Bao Guo ◽  
Ming Yu Wang ◽  
Yi Fei Mei
Keyword(s):  
Detection Limit ◽  
Ion Chromatography ◽  
Potential Method ◽  
Concrete Cover ◽  
Chloride Ions ◽  
Accurate Analysis ◽  
Chromatography Method ◽  
Concrete Materials ◽  
Corrosion Of Steel

The determination of chloride ions in concrete materials accurately is far and away crucial, since chloride ions can cause corrosion of steel and concrete cover off. The conventional potential method and silver nitrate titration method usually show features of simple operation and short duration, nevertheless, they are not suitable for accurate analysis for concrete attributing to their low accuracy and detection limit. In this paper, an ion chromatography method was presented to determine chlorine in concrete materials. Concrete samples were pre-processed and then extracted with distilled water. The extraction solutions were purified on a 0.22 μm filter membrane, an On Guard SPE-RP column and a SPE-H column sequentially for eliminating undissolved substance, organisms and metal ions before ion chromatographic analysis. The chromatographic separation was performed on a Dionex ICS-1000 Chromatographic using 25.0 mmol/L KOH solutions as mobile phase at 1.0 mL/min. Results show that the detection limit of the method was 0.004 mg/L. The linear relationship of the external Cl- standard solutions was 0.9994, and the sample analytical RSD was 0.44%.

Development and validation of an ion chromatography method for the determination of phosphate-binding of lanthanum carbonate

2010 ◽  
Vol 51 (5) ◽  
pp. 1108-1112 ◽  
Author(s):  
Raghu Samy ◽  
Patrick J. Faustino ◽  
Wallace Adams ◽  
Lawrence Yu ◽  
Mansoor A. Khan ◽  
...  
Keyword(s):  
Ion Chromatography ◽  
Lanthanum Carbonate ◽  
Phosphate Binding ◽  
Chromatography Method ◽  
Development And Validation
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