GB/T 34701-2017 in English

Background of standard formulation

With the increasingly stringent environmental protection policies in my country, flue gas denitration technology is being used more and more widely. As a key equipment, the regenerated flue gas denitration catalyst requires trace element analysis in its service life and performance evaluation.

Technical principles and methods

This standard uses Inductively coupled plasma atomic emission spectrometry (ICP-AES) as the core detection method. This method uses a high-purity argon flame under acidic conditions to atomize the sample solution and introduce it into the inductively coupled plasma, and uses the characteristic emission lines of the elements for quantitative analysis.

Key instruments and reagents

• Inductively coupled plasma optical emission spectrometer
• Nitric acid, hydrofluoric acid and other standard solutions
• Polytetrafluoroethylene digestion tank (PTFE)

Terminology Explanation and Practical Application Cases

In the standard, ICP-AES is a highly sensitive elemental analysis technology that is widely used in environmental monitoring and industrial testing. For example, in the regenerated flue gas denitrification catalyst, the content of trace elements such as potassium and iron directly affects its catalytic performance. The method of this standard can accurately determine the mass fraction of these elements and provide data support for the optimization design of the catalyst.

Comparative Analysis of Standard Frameworks

Compared with normative documents such as GB/T 602 and GB/T 6682, this standard has higher professionalism and pertinence in reagent preparation, sample processing and instrument operation. Especially in the quantitative analysis of trace elements, more stringent experimental conditions are used.

Implementation Advice

1. Prepare reagents and samples in strict accordance with standard requirements to ensure the use of high-grade pure reagents.
2. During instrument operation, pay special attention to the control of argon purity and atomization efficiency.
3. It is recommended to establish a regular calibration system to ensure the accuracy of the working curve.