Ion chromatography separation and analysis method of organic phosphonic acid scale and corrosion inhibitor
A scale and corrosion inhibitor, chromatographic separation technology, applied in the direction of material separation, analysis materials, measuring devices, etc., can solve the problems of complicated operation, inability to accurately reflect the effective concentration of organic phosphonic acid, and inability to determine the active components at the same time, to achieve The effect of process simplification
Inactive Publication Date: 2014-08-27
ZHEJIANG UNIV
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Problems solved by technology
The determination of the content of phosphonate scale and corrosion inhibitors has iron nitrate post-column derivatization-ultraviolet detection method. This kind of method requires derivation, which makes the operation complicated and easily introduces errors
When using the quinolybdenum limonium copper precipitation method and ammonium violate as the indicator to analyze with the copper sulfate standard solution titration method, it cannot accurately reflect the effective concentration of organic phosphonic acid, and cannot simultaneously determine the active components of different structures
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[0029] This example analyzes three mixed sample solutions of scale and corrosion inhibitors containing phosphonates
[0030] Instruments used: ion chromatography CIC-100 (Qingdao Shenghan Chromatography Technology Co., Ltd.); P6000 preparative high-pressure infusion pump (Beijing Innovation Hengtong Technology Co., Ltd.); SH-ZHWX column thermostat; Shodex IC NI-424 anion exchange column; 100 μL quantitative loop. Flow rate: 1.0mL / min; Column temperature: 40°C; Injection volume: 100μL;
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Abstract
The invention relates to an ion chromatography separation and analysis method of an organic phosphonic acid scale and corrosion inhibitor, in particular to an ion chromatography separation and analysis method of a phosphonate corrosion inhibitor for isocratic separation of non-suppressible conductivity detection. The ion chromatography separation and analysis method comprises the following steps of: baseline surveying and mapping, sample introduction and ion exchange, elution and non-suppressible conductivity detection and analysis. The ion chromatography separation and analysis method has the beneficial effects that three commonly-used phosphonate scale and corrosion inhibitors can be subjected to good separation and analysis, and the relative standard deviation of retention time, peak height and peak area is less than 4 percent; the technical progress is simplified; and the method can be used for detecting the content of a phosphonate scale and corrosion inhibitor and can also detect the purity of an actual sample at the same time.
Description
technical field [0001] The present invention relates to the ion chromatographic separation and analysis method of phosphonate scale and corrosion inhibitors (including hydroxyethylidene diphosphonic acid, aminotrimethylene phosphonic acid and sodium ethylenediamine tetramethylene phosphonate), in particular to isocratic Ion Chromatographic Separation Analytical Method for Separation of Phosphonate Scale and Corrosion Inhibitors with Non-Suppressive Conductometric Detection. Background technique [0002] Chelating agents containing C-P bonds are widely used in water treatment, industrial cleaning and descaling, and can be used as corrosion and scale inhibitors for circulating water and boiler water, complexing agents for cyanide-free electroplating, chelating agents and oxygen for textile printing and dyeing drift stabilizer. The determination of the content of phosphonate scale and corrosion inhibitors has ferric nitrate post-column derivatization-ultraviolet detection meth...
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IPC IPC(8): G01N30/02
Inventor 刘玉秀陈梅兰陈智栋朱岩
Owner ZHEJIANG UNIV