GB/T 321-1980
Replaced
T/CMA 035-2021
Active
Group standards
T/CMA 035-2021 Calibration Method for Coulomb Analyzers of Petroleum Products
T/CMA 035-2021
Price:
$ 20.00
Basic Information
Standard Code:
T/CMA 035-2021
Standard Type:
Group standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
-
ICS Name:
Integrated Metrology and Measurement
Publish Date:
2021-05-20
Implement Date:
2021-06-20
Scope
Main technical content: The Coulomb analyzer for petroleum products is suitable for the determination and analysis of trace sulfur and chlorine content in petroleum products. It is a closed-loop negative feedback system composed of a Coulomb amplifier designed in a zero-balance mode, a titration cell, and a suitable electrolyte solution. The specific principle is that after the sample is injected into the cracking tube by a syringe, the measured substances in the sample are reacted to convert into titratable sulfur dioxide and hydrogen chloride, which are then carried into the titration cell by the carrier gas and absorbed by the electrolyte solution. The reaction consumes the titrant in the electrolyte solution, causing a change in the potential of the measuring electrode in the electrolysis cell. This change is amplified by the Coulomb amplifier and applied to the electrolysis electrode pair. At the anode, the titrant is electrolyzed until the titrant concentration returns to its initial value. During the process of consuming and replenishing the titrant, the instrument measures the amount of electricity consumed during the electrolysis process, and calculates the corresponding sulfur and chlorine content in the sample according to Faraday's law.