Solid sample organic carbon content data acquisition method, system, equipment and application

Abstract

The invention belongs to the technical field of organic carbon content data processing in solid samples such as soil and sediments, and discloses a solid sample organic carbon content data acquisition method, system and equipment and application. The method includes: turning off the electrical signal automatic collection termination function of an instrument; reserving a peak curve slope detection function, setting a low slope threshold value, and monitoring slope change in real time; if a curve regression baseline reaches a preset slope threshold value, popping up a dialog box, namely whether analysis is ended or analysis is continued according to detection setting time; after an operator judges that data acquisition is completed, selecting ending of the analysis, and carrying out detection of a next sample; when an operator judges that data acquisition is not completed, selecting further analysis, and enabling the instrument to continuously collect data according to the detection set time until the end; and detecting the next sample. About 4 minutes are saved for each sample, so that the working efficiency is improved; and for a sample with a complex matrix, the accuracy of a detection result and the precision of repetitive measurement of the sample are improved.

Description

technical field [0001] The invention belongs to the technical field of organic carbon content data processing in solid samples such as soil and sediment, and in particular relates to a method, system, equipment and application for collecting data of organic carbon content in solid samples. Background technique [0002] At present, when the existing instrument (Shimadzu TOC-L+SSM5000) analyzes solid samples, the main working principle is as follows: using the high-temperature catalytic combustion method, the weighed sample is injected into the TC combustion tube filled with oxidation catalyst, and heated At 900°C, the TC in the sample is burned and decomposed into carbon dioxide, and the combustion product is introduced into the cell of the non-infrared gas analysis unit (NDR) through the carrier gas, and the carbon dioxide is detected. The detected peak area of ​​NDIR is calculated in the data processing part. Since the peak area is proportional to the TC concentration in t...

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Problems solved by technology

[0004] ①In the actual operation process, when the sample chamber is opened for sample addition or replacement, air is introduced into the entire system, and the sensitive NDIR detector can detect a small amount of carbon dioxide in the air, resulting in fluctuations in the baseline. Every time the sample is replaced Finally, you need to wait for about 2 minutes, wait for the peak of carbon dioxide in the air to come out, and start the actual sample test after the baseline is stable. If you don’t wait for the carbon dioxide in the air to be detected, the actual sample will be tested after the baseline is stable, which will easily cause the actual sample to be tested in advance. End, (the system defaults to the end of the baseline zero detection process), the sample detection failed

[0008] (1) The data acquisition of the existing instrument is in the automatic termination mode, that is, the data acquisition is ended when the slope change of the electrical signal is detected to be less than a fixed value within the specified time; when the sample is replaced, it is necessary to wait for the air peak of about 2 minutes, which reduces the work efficiency

[0009] (2) For samples that react slowly, the data collection ends early, and the measurement results cannot objectively reflect the content of inorganic carbon in the actual sample, resulting in inaccurate determination of organic carbon content

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