Method for determining nitrogen content

A technology of nitrogen content and mixed gas, applied in the field of detection, can solve problems such as environmental pollution, time-consuming, complicated operation steps, etc.

Inactive Publication Date: 2016-11-09
DINGTAI HUIBEI BIOCHEM INSTR MFG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The invention provides a method for measuring nitrogen content, which solves or partially solves the technical defects in the prior art such as the use of corrosive acid and alkali, complicated operation steps, long time consumption and serious environmental pollution.

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  • Method for determining nitrogen content
  • Method for determining nitrogen content
  • Method for determining nitrogen content

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art belong to the scope of protection of the present invention; wherein the keyword "and / or" involved in this embodiment means and, or two Situation, in other words, A and / or B mentioned in the embodiment of the present invention represents two situations of A and B, A or B, and describes the three states that A and B exist, such as A and / or B, means: only includes A and does not include B; only includes B and does not include A; includes A and B.

[0030] Meanwhile, in the embodiments of the present invention, when a component is referred to as being “...

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Abstract

The invention provides a method for determining the nitrogen content, and belongs to the technical field of detection. The method comprises the following steps: combusting a sample to be determined by using a combustion device to generate a mixed gas; reducing the mixed gas through a reducing device; purifying the reduced mixed gas through a purifying device o remove impurities in order to obtain residual gas, wherein the impurities comprise at least one of water, carbon dioxide and halogens; and detecting the nitrogen content of the residual gas through a detecting device. The technical defects of use of corrosive acid and alkali, complicated operating steps, long time consumption and severe environment pollution, caused by adopting a Kjeldahl determination technology in traditional methods, are solved in the invention.

Description

technical field [0001] The invention belongs to the technical field of detection, in particular to a method for measuring nitrogen content. Background technique [0002] The determination of total nitrogen / protein content is widely used in the detection of dairy products, food, animal feed, grains, fertilizers, tobacco, plants and other products. The traditional detection method is the Kjeldahl method, which has been implemented as an industrial standard for many years, but The use of corrosive acid and alkali, complicated operation steps, long time-consuming and serious environmental pollution have been difficult to meet the needs of today's detection development. Specifically, it converts organic nitrogen into inorganic ammonium salts by digesting the sample with concentrated sulfuric acid under the condition of a catalyst, and then converts the ammonium salts into ammonia under alkaline conditions, distills off with water vapor and is the excess acid Liquid absorption, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01N30/66
CPCG01N30/66G01N31/12
Inventor 储涛王军聂明达郭立新朱晶晶余欣雨
Owner DINGTAI HUIBEI BIOCHEM INSTR MFG
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