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Method for detecting metal cations in liquid by capillary electrophoresis

A capillary electrophoresis and metal cation technology, which is applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as narrow linear range, and achieve the effects of wide linear range, fast detection speed, and large interval between peaks.

Inactive Publication Date: 2017-11-24
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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  • Abstract
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Problems solved by technology

[0004] Aiming at the problem of narrow linear range of existing detection technology, the present invention provides a capillary electrophoresis detection method for metal cations in liquid

Method used

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  • Method for detecting metal cations in liquid by capillary electrophoresis
  • Method for detecting metal cations in liquid by capillary electrophoresis
  • Method for detecting metal cations in liquid by capillary electrophoresis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, purchased respectively the standard solution of potassium, calcium, sodium, magnesium, ion from the market, concentration is 1000mg / L, uses Agilent capillary electrophoresis instrument as test instrument. The background electrolyte contains 8mmol / L α-glycolic acid, 8mmol / L imidazole and 5% methanol, and the pH is adjusted to 3.7 with 0.1mol / L hydrochloric acid; pressure injection is used, the pressure is 50mbar, and the time is 3s; the electrophoresis voltage is 18KV; the detection wavelength is 214nm, Reference wavelength 550nm; run time 8 minutes.

[0027] The first step is to prepare single-standard solutions of potassium, calcium, sodium, and magnesium ions with a concentration of 100mg / L, and accurately measure 10mL of the four ion standard solutions (concentration 1000mg / L), and add them to 100mL volumetric flasks to volume , to obtain 100 mg / L single-standard solution of each ion, and pass through capillary electrophoresis to obtain the peak time of...

Embodiment 2

[0038] Example 2, the detection method and calculation method are the same as in Example 1, and the concentration (mg / L) of each ion in the No. 2 sample is obtained, which are respectively:

[0039] Potassium ion

Embodiment 3

[0040] Example 3, the detection method and calculation method are the same as in Example 1, and the concentration (mg / L) of each ion in the No. 2 sample is obtained, which are respectively:

[0041] Potassium ion

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Abstract

The invention discloses a method for detecting metal cations in a liquid by capillary electrophoresis, belongs to the technical field of chemical detection, and can solve the problem of a narrow linear range of detection techniques in the prior art. The method comprises the following steps: respectively preparing single standard solutions of ions, and using a capillary electrophoresis apparatus to obtain peak appearance time of the ions; preparing mixing standard solutions with different concentrations of the ions, and using the capillary electrophoresis apparatus to obtain the linear characteristic relationship between the concentrations of the ions and peak areas; detecting a sample to be tested to obtain the peak areas, calculating the concentrations of the ions in the sample to be tested. The method has the advantages of large peak interval, wide linear range, high accuracy and high detection speed.

Description

technical field [0001] The invention belongs to the technical field of chemical detection, and in particular relates to a capillary electrophoresis detection method for metal cations in liquid. Background technique [0002] There are many reports on capillary electrophoresis detection of metal cations in liquid. Shu Youqin et al. used the solution of imidazole and α-glycolic acid as the background electrolyte to separate and detect six metal cations in the literature "Capillary Electrophoresis Analysis of Six Metal Cations in Beverages". In the literature "Determination of various water-soluble metal ions by capillary electrophoresis", Shi Mei et al. developed a method for the separation and detection of metal ions in 10 using imidazole and acetic acid as the background electrolyte. But these methods generally have the deficiency of narrow linear range. The main reason is that the time interval between two adjacent peaks is relatively small, and some peaks have severe tail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/447
CPCG01N27/44726
Inventor 任恒星陈林勇关嘉栋郭鑫赵娜赵晗王美林苗彪刘健吴鹏
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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