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Method for determining geosmin and 2-methylisoborneol in sediments

A technology of methyl isocamphenol and a determination method, which is applied in the field of determination of geosmin and 2-methyl isocamphenol, can solve the problem that 2-methyl isocamphenol in the product has not been reported, and the odor substances of water body are increased. Advanced problems, to achieve the effect of optimizing the extraction time and meeting the detection needs

Pending Publication Date: 2020-12-01
苏州见远检测技术有限公司
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Problems solved by technology

[0002] Geosmin and 2-methylisoborneol are secondary metabolites that are continuously secreted and released by algae and fungi, and are one of the main substances that cause musty smell in water. After the death of algae and fungi, they will be deposited At the bottom of the water body, sediments are formed with mud, and these sediments also contain odorous substances. These odorous substances in the sediments will be released into the water again under sudden changes in external conditions (such as water flow, strong wind), resulting in Olfactory substances in the water body increase; there are many methods for measuring 2-methylisoborneol in water at present, but there is no report for the determination of 2-methylisoborneol in sediments. The methyl isoborneol method is necessary

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  • Method for determining geosmin and 2-methylisoborneol in sediments
  • Method for determining geosmin and 2-methylisoborneol in sediments

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[0019] In order to make the technical solution of the present invention clearer, the present invention will be further described below in conjunction with specific embodiments of the accompanying drawings.

[0020] Such as Figure 1-3 Shown, according to the assay method of geosmin and 2-methylisoborneol in a kind of sediment of the embodiment of the present invention, it is characterized in that: comprise the steps;

[0021] A: Sampling, take a portion of about 2g of sediment into a 20ml headspace sample bottle, then add 2.0g of sodium chloride, screw on the bottle cap, and wait for testing. Take another part (about 2g) for the determination of the moisture content of the sample;

[0022] B: Headspace solid-phase microextraction, choose 50 / 30μm DVB / CAR / PDMS extraction head; extraction conditions: heating temperature 70°C; extraction time 35min; depth of extraction head inserted into the bottle 25mm; analysis time 5min; heater speed 500rpm;

[0023] C: GC-MS analysis. After ...

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Abstract

The invention aims at overcoming the defects of the existing sample detection technology, and particularly relates to a method for determining geosmin and 2-methylisoborneol in sediments, which comprises the following steps of sampling, headspace solid phase micro-extraction and GC-MS analysis. According to the method, the extraction effects of different types of extraction heads are compared, theextraction conditions such as the extraction time, the extraction temperature and the like are optimized, the headspace solid phase micro-extraction / gas chromatography / mass spectrometry method is established to simultaneously determine the geosmin and the 2-methylisoborneol in the sediment, and the method has characteristics of sensitivity, rapidness, environmental protection and the like, can accurately quantify the odor substances in the sediment, and can meet the detection requirements of the actual sample.

Description

technical field [0001] The invention relates to a method for determining chemical substances, in particular to a method for determining geosmin and 2-methylisoborneol in sediments. Background technique [0002] Geosmin and 2-methylisoborneol are secondary metabolites that are continuously secreted and released by algae and fungi, and are one of the main substances that cause musty smell in water. After the death of algae and fungi, they will be deposited At the bottom of the water body, sediments are formed with mud, and these sediments also contain odorous substances. These odorous substances in the sediments will be released into the water again under sudden changes in external conditions (such as water flow, strong wind), resulting in Olfactory substances in the water body increase; there are many methods for measuring 2-methylisoborneol in water at present, but there is no report for the determination of 2-methylisoborneol in sediments. The methyl isoborneol method is n...

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/062
Inventor 张泾凯顾雪华鄢姝恺
Owner 苏州见远检测技术有限公司
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