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Method and device for quickly and accurately resolving and measuring total nitrogen with portable pressure cooker combined with colorimetric tubes

A colorimetric tube and pressure cooker technology, which is used in measurement devices, preparation of test samples, and color/spectral characteristics measurement, etc., can solve problems such as liquid leakage, improve precision and accuracy, improve success rate, and prevent tube plugging. The effect of loosening the problem

Inactive Publication Date: 2019-02-19
HUNAN UNIV
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AI Technical Summary

Problems solved by technology

[0009] In the actual total nitrogen measurement, the blank absorbance is too large and the liquid leaks out after the bottle stopper is unstable due to high-temperature digestion. Reduce the possibility of failure due to high absorbance of the blank sample, and prevent loosening of the tube plug caused by high temperature conditions, and the adjustable nut used can be flexibly adapted to colorimetric tubes of different specifications

Method used

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  • Method and device for quickly and accurately resolving and measuring total nitrogen with portable pressure cooker combined with colorimetric tubes
  • Method and device for quickly and accurately resolving and measuring total nitrogen with portable pressure cooker combined with colorimetric tubes
  • Method and device for quickly and accurately resolving and measuring total nitrogen with portable pressure cooker combined with colorimetric tubes

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Embodiment 1

[0032] The traditional digestion method and the above-mentioned equipment and methods were respectively used to digest total nitrogen in a civil pressure cooker. The absorbance values ​​of each concentration are as follows:

[0033] Using the traditional digestion method, because the distance between the colorimetric tubes is too small, the high-pressure steam cannot be fully contacted, and the insufficient digestion results in residual persulfate, which affects the absorbance value. The absorbance value of potassium nitrate with different concentration gradients is shown in the table below. Show:

[0034] Table 1: Total nitrogen standard curve for traditional digestion treatment

[0035]

[0036] Total nitrogen concentration C N =3.6739A r -0.1293R 2 =0.8924

[0037] where C N is the total nitrogen concentration mg / L in the colorimetric tube, Ar is the difference between the corrected absorbance of the standard solution and the corrected absorbance of the zero concent...

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Abstract

The invention belongs to the technical field of environmental protection, and relates to a method and a device for quickly and accurately resolving and measuring total nitrogen with a portable pressure cooker combined with colorimetric tubes. According to the method and the device, the colorimetric tubes can be vertically and uniformly distributed in the portable pressure cooker, so that samples can sufficiently contact with high temperature steam; sufficient digestion of potassium persulfate is achieved, so that the problem of excessive white light absorption caused by incomplete digestion ofthe potassium persulfate is solved; the method and the device can also fix the plugs of the colorimetric tubes, so that the measurement error caused by loosening or ejection of the plugs of the colorimetric tubes in the high-temperature and high-pressure environment is prevented; the invention takes full advantage of the existing pressure cooker and the colorimetric tubes in the total nitrogen measuring labor, so that idle and waste of resources are not incurred; the problem of excessive white light absorption caused by incomplete digestion can be prevented to the greatest extent; in this way, a lot of manpower and material resources in the exploration process of the operator can be saved; and the invention has an important meaning in total nitrogen measurement.

Description

Technical field: [0001] The invention mainly relates to the field of environmental protection technology, in particular to an auxiliary method and device for realizing rapid and accurate measurement when using alkaline potassium persulfate digestion ultraviolet spectrophotometry industry standard to measure total nitrogen. Background technique: [0002] With the development of society and the intensification of human activities, the disturbance to the natural world is increasing, and environmental pollution has become a problem of concern to everyone. Among all kinds of environmental pollution problems, water eutrophication has gradually become one of the most concerned objects of researchers because of its wide range and great impact on life. It is caused by the discharge of a large amount of domestic sewage, industrial wastewater and agricultural water into the water body and brings in a large amount of nitrogen and phosphorus elements, which makes the water body nitrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N21/75G01N21/03G01N1/44
CPCG01N1/44G01N21/03G01N21/33G01N21/75G01N2021/0325G01N2021/0367G01N2021/752
Inventor 伍艳馨牛钱钱王冬波陈耀宁杨静楠何丹丹刘军刘旭冉曾光明
Owner HUNAN UNIV
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