Method for testing content of nickel in industrial sulfuric acid by flame atomic absorption spectroscopy method

A flame atomic absorption and industrial sulfuric acid technology, applied in the field of analysis and detection, can solve problems such as nickel hazards, and achieve the effect of avoiding losses and reducing the sample size.

Inactive Publication Date: 2014-11-26
JILIN INST OF CHEM TECH
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Problems solved by technology

[0002] Nickel is one of the trace elements needed by the human body, but excessive nickel will cause serious harm to the human body

Method used

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Embodiment Construction

[0014] In order to enable those skilled in the art to better understand the solution of the present invention, and to make the above-mentioned purpose, features and advantages of the present invention more obvious and comprehensible, the present invention will be described in further detail below in conjunction with examples.

[0015] A method for testing nickel content in industrial sulfuric acid by flame atomic absorption method, comprising the following steps:

[0016] Preparation of sample solution: Pipette a certain quality of industrial sulfuric acid sample solution, dilute it to a 100mL volumetric flask with ultrapure water, and prepare a sample solution with a mass concentration of 10%.

[0017] Preparation of blank solution: dilute with ultrapure water to constant volume to prepare a blank solution with the same mass concentration as the sample solution by diluting analytically pure sulfuric acid.

[0018] Preparation of standard solution: 10% dilute sulfuric acid was...

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Abstract

The invention relates to a method for testing the content of nickel in industrial sulfuric acid by a flame atomic absorption spectroscopy method. The method provided by the invention is mainly used for analyzing and detecting aiming at industrial sulfuric acid. A sample is not required to be subjected to digestion processing; the absorbance of a nickel element in a sample is determined by adopting an air-acetylene flame atomic absorption spectrometry, and the content of the nickel element is calculated by adopting a standard curve method. The method provided by the invention is accurate, rapid, and is good in trace amount and reproducibility, and is a method for rapidly analyzing and determining the content of the nickel element in the industrial sulfuric acid. In the preparation of industrial sulfuric acid, metal impurities of ferrum, copper, nickel and the like are inevitably brought into industrial sulfuric acid products for the reasons of mineral sources, pipelines, equipment and the like, the impurities not only affect the quality of the industrial sulfuric acid products, but also affect the use of the industrial sulfuric acid in the industries of electronics, reagents, pharmacy, textile and the like; in the quality standard of the domestic industrial sulfuric acid, the contents of ferrum, arsenic, lead and mercury are required correspondingly, but the content of metal nickel is not defined. According to the method provided by the invention, the metal nickel in the industrial sulfuric acid is detected by utilizing a flame atomic absorption spectrometer, an analytical method is established, and means and reference data are provided for completing relevant quality standard.

Description

technical field [0001] The invention relates to a method for testing nickel content in industrial sulfuric acid by flame atomic absorption spectrometry, belonging to the technical field of analysis and detection. Background technique [0002] Nickel is one of the trace elements needed by the human body, but excessive nickel will cause serious harm to the human body. When the nickel content in the body exceeds a certain limit, it can cause skin allergies, induce cancer, cause respiratory system disorders and injure people's central nervous system. EU countries stipulate that the release of nickel in products that are in direct contact with human skin for a long time shall not exceed 0.5 μg / mL per week. [0003] Industrial sulfuric acid is an important auxiliary agent for preparing spinning bath in the production process of viscose fiber. Due to the reasons of mineral sources, pipelines, equipment and other aspects in the preparation process, metal impurities such as nickel a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33
Inventor 金华马明硕高燕
Owner JILIN INST OF CHEM TECH
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