Ion chromatography method for simultaneously and quantitatively measuring concentrations of 10 kinds of anions in rice

An anion concentration and ion chromatography technique, applied in the field of quantitative analysis for the determination of 10 kinds of anions in rice, can solve problems such as lack of research on column temperature

Inactive Publication Date: 2020-01-03
XIANGTAN UNIV
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Problems solved by technology

Mu Shifang (Mu Shifang. Commonly used methods for improving resolution in ion chromatography[J]. Environmental Chemistry, 2002, 21(03): 307-308) summarized the commonly used methods for improving r

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  • Ion chromatography method for simultaneously and quantitatively measuring concentrations of 10 kinds of anions in rice
  • Ion chromatography method for simultaneously and quantitatively measuring concentrations of 10 kinds of anions in rice
  • Ion chromatography method for simultaneously and quantitatively measuring concentrations of 10 kinds of anions in rice

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Embodiment Construction

[0053] The present invention selects IonPac AS23 anion exchange chromatographic column and conductivity detector to detect 10 kinds of anions in rice. IonPac AS23 columns are suitable for Na 2 CO 3 -NaHCO 3 mobile phase system, under which F - , Cl - 、Br - , NO 3 - , NO 2 - 、PO 4 3- , SO 4 2- Anion separation effect is good, but CrO 4 2- The anion peak is too late, the analysis time is long, the peak shape is asymmetrical, the high concentration carbonate system, the analysis time is shortened, but there is serious peak overlap, the resolution is not enough, the column temperature is increased, the baseline of the carbonate system is not good Stable, affecting analytical sensitivity, 10 kinds of anions cannot be effectively separated. The technical difficulty in quantifying multiple anions at the same time lies in the good separation of each ion and the short analysis time.

[0054] According to the chromatographic theory, the formula for calculating the resolu...

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Abstract

The invention discloses an ion chromatography method for simultaneously and quantitatively measuring the concentrations of 10 kinds of anions in rice. The 10 kinds of anions comprise F-, Ac-, Cl-, NO2, Br-, NO3-, SO4<2->, C2O4<2->, PO4<3->, and CrO4<2->. The concentrations and peak areas of F-, Ac-, Cl-, NO2, Br-, NO3-, SO4<2->, C2O4<2->, PO4<3->, and CrO4<2-> are quantified by an external standard method to show a strict linear relationship, the linearly dependent coefficient is more than 0.999, and the relative standard deviation is within 2.05%. The method is time-saving and efficient and can simultaneously quantify the 10 kinds of anions in rice, the peaks are attractive, the analysis results are accurate, the repeatability is high, derivation and gradient elution are not required, thepeak width and retention time are improved by column temperature, the 10 kinds of anions are well separated, the effect of temperature on the retention factor can be described by Van't Hoff equation,and an effective guidance can be provided for the analysis of rice ion composition and the nutrition and safety.

Description

technical field [0001] The invention relates to a quantitative analysis method for determining 10 kinds of anions in rice. Background technique [0002] The quality of rice is related to people's life safety and health, and the content and type of anions in rice affect its quality and taste. Different types of anions have different effects on the human body, and anion concentrations that are too high or too low are not conducive to health. Anions in rice are represented by F - , Cl - 、Br - , NO 3 - , NO 2 - 、PO 4 3- , SO 4 2- 、C 2 o 4 2- The most common (Xia Liya. Research on the characteristic factors and traceability methods of rice origin [D]. Hebei University, 2013.), among them, fluorine is a trace element needed by the human body. When the intake is too low, people are prone to dental caries and osteoporosis. If Long-term consumption of rice with high fluoride content can easily cause dental fluorosis and skeletal fluorosis, and even cause damage to live...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/54G01N30/86
CPCG01N30/02G01N30/54G01N30/8679G01N2030/047
Inventor 段正康赵珍珍赵云鹭
Owner XIANGTAN UNIV
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