Detection method for measuring mercury content in slag concentrate by atomic fluorescence spectrometry
The copper slag concentrate was pre-dryed by atomic fluorescence spectrometry, dissolved and oxidized mercury to the high-valent state using hydrochloric acid, nitric acid and hydrofluoric acid. The stannous chloride reducing agent was used to measure it in an atomic fluorescence spectrometer, which solved the accuracy and stability of the detection of mercury content in copper slag concentrate, and achieved a low detection limit and a wide measurement range.
Patent Information
- Application Number
- CN202510739490.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-08-22
AI Technical Summary
The existing mercury content detection methods in copper slag concentrate have problems such as incomplete dissolution, inaccurate measurement results and complex operation. Especially in traditional methods, the impact of silicon materials caused by incomplete dissolution of hydrochloric acid, the instability of the result caused by the reduction of hydroxylamine hydrochloride, and the error caused by mercury vapor volatility.
Atomic fluorescence spectroscopy was used to remove moisture by pre-drying the sample, dissolve the sample using hydrochloric acid, nitric acid and hydrofluoric acid, and then add potassium dichromate to an oxide of mercury to the high-valent state. The mercury content was measured in the atomic fluorescence spectrometer using stannous chloride as a reducing agent.
It realizes the characteristics of low detection limit, wide measurement range, and high, avoids the influence of incomplete dissolution and time, and improves the accuracy and stability of the measurement results.