The effect of environmental conditions and electrical charge on the weighing accuracy of different filter materials.
Different filter materials and electrical charge elimination methods were used to investigate the weighing accuracy of filter papers under different environmental conditions. The results show that the standard deviations (S.D.) of weight data for glass fiber and MCE filters were substantial without environmental control, whether or not the electrical charge eliminators were used. Values of 0.157 and 0.349 mg were determined for glass and MCE filters, respectively. The accuracy of weighing was substantially improved and the S.D. was reduced to 0.01 and 0.09 mg for glass fiber and MCE filters, respectively, after applying the environmental control conditions. For PVC and Teflon filters, the accuracy of weighing was good, even in the uncontrolled environmental conditions, whether or not the electrical charge eliminators were used. The S.D. values of weighing data of PVC and Teflon filters were 0.007 and 0.011 mg, respectively.
Institute of Environmental Engineering, National Chiao Tung University, Hsin Chu, Taiwan. cjtsai@cc.nctu.edu.tw
Chuen-Jinn
CJ
Tsai
Chung-Tso
CT
Chang
Bow-Huei
BH
Shih
Shankar G
SG
Aggarwal
Shou-Nan
SN
Li
Hung Min
HM
Chein
Tung-Sheng
TS
Shih
D004560:Electricity; D004777:Environment; D004784:Environmental Monitoring / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D005374:Filtration; D015203:Reproducibility of Results
D004785:Environmental Pollutants