Development of a pretreatment workstation for detecting free silica levels in dust
10.20001/j.issn.2095-2619.20250817
- VernacularTitle:粉尘中游离二氧化硅水平测定前处理工作站研制
- Author:
Jian WU
1
;
Yuqiao ZHENG
;
Meng LUO
;
Mengping ZHANG
;
Junyi HUANG
;
Fei SHEN
;
Feng ZHANG
;
Sheng FU
;
Xuelei CHEN
;
Zongli HUO
;
Banghua WU
Author Information
1. Jiangsu Provincial Center for Disease Control and Prevention (Jiangsu Provincial Academy of Preventive Medicine), Nanjing, Jiangsu 210009, China
- Publication Type:Journal Article
- Keywords:
Dust;
Free silica;
Pyrophosphate method;
Digestion;
Filtration;
Pretreatment;
Automatic;
Workstation
- From:
China Occupational Medicine
2025;52(4):455-459
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate an automated pretreatment technology for detecting levels of free silica in workplace dust. Methods An fully automated pretreatment workstation for detecting free silica levels in workplace dust was developed by integrating graphite-controlled digestion temperature, online-controlled dilution of digestion solutions, and filtration endpoint recognition based on monitoring technology, combined with multi-channel synchronous measurements. Results The fully automatic pretreatment workstation was used to digest and filter 14 standard samples of free silica produced by three institutions, and then detected by pyrophosphate method. The result range of high-, medium-, and low-level free silica standard samples detection was 66.5%-84.8%, 40.0%-44.5%, and 2.1%-24.8%, respectively. The mean relative standard deviations were 3.9%, 1.4% and 1.5%. Conclusion The fully automated pretreatment workstation produced results that met relevant requirements. It can effectively replace the manual digestion and filtration steps of the pyrophosphate method to measure free silica levels in workplace dust and enable rapid detection of free silica in dust samples.
