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Snow ice sample pretreatment and organic acid measuring method

A technology of sample pretreatment and measurement method, which is applied in the field of organic acid measurement, can solve problems such as easy pollution, low content, and quantitative determination that trouble researchers, and achieve the effects of preventing pollution, improving measurement accuracy, and improving reproducibility

Active Publication Date: 2014-12-03
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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Problems solved by technology

Because its source is closely related to the biological world, the study of its records in snow and ice is one of the ways to understand the biogeochemical cycles of biogenic elements such as C, H, and O from a historical perspective, and to understand past ecological and environmental changes. However, due to its low content and easy to be polluted, the quantitative determination of organic acid content in snow and ice has always been a problem that plagues researchers.

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  • Snow ice sample pretreatment and organic acid measuring method

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Embodiment Construction

[0030] Below, the technical scheme of the present invention will be further described in conjunction with the accompanying drawings:

[0031] A snow and ice sample pretreatment and organic acid measurement method, the steps comprising:

[0032] (1) Pretreatment of snow and ice samples:

[0033] The ice cores drilled in the field were cut at intervals of 2 cm. In order to prevent the pollution of the organic acid components in the ice core during the drilling process, only the middle part of 2 cm × 2 cm × 2 cm was taken as the analysis sample, and the above samples to be tested were Put it in a vial, weigh it, place it in a freeze-drying box, and freeze-dry it. Because the air contains a certain amount of organic acids, snow and ice melt slowly at room temperature, and heating the sample may cause volatilization and thermal instability of the analyte in the sample. Therefore, the method of freeze-drying snow and ice samples to sublimate the moisture from solid to gaseous stat...

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Abstract

The invention discloses a snow ice sample pretreatment and organic acid measuring method which is as follows: snow ice is quickly prepared into a to-be-tested sample solution by freeze drying pretreatment, by application of freeze drying treatment, ultra pure water is added for fixing the volume of the solution until the solution has the same mass with the solution before the freeze drying; and the content of organic acid in a snow ice sample can be measured by use of ion chromatography as a test manner. The pretreatment and measuring method is simple and rapid, and in the sample testing results, citric acid and lactic acid reproducibility is high. The harm of acid rain crops on the ground surface can be monitored, and the scientific basis for the development of social economy is provided.

Description

[0001] technical field [0002] The invention relates to the measurement of organic acids, in particular to the measurement of organic acids in snow and ice samples by ion chromatography. Background technique [0003] Biological organic acids are the components of acid rain and have an important impact on the surface environment. Because its source is closely related to the biological world, the study of its records in snow and ice is one of the ways to understand the biogeochemical cycles of biogenic elements such as C, H, and O from a historical perspective, and to understand past ecological and environmental changes. However, due to its low content and easy to be polluted, the quantitative determination of organic acids in snow and ice has always been a problem for researchers. Contents of the invention [0004] In order to measure the content of organic acids in snow and ice and understand the impact of acid rain on the surface, the purpose of the present invention is...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/02G01N1/08
Inventor 王晓香张耀南赵生国崔晓庆王荣李森王肖波
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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