Abstract
Automatic pH measurement system was developed by using a flow-through type differential pH-FET sensor. The system was operated by repeating 60 sec cycle consisting of 36 sec of washing period, 4 sec of moving period, and 20 sec of measuring period. In washing period, the differential pH-FET sensor was washed with baseline solution. In measuring period, about 50 μ1 of sample solution was withdrawn to the space around a measurement pH-FET, and the change of differential source potential was measured. Absolute values of error for nine sample solutions with weak buffering ability were less than 0.146 pH, and were 0.071 pH in average. From this experiment, it was suggested that high-speed and automated pH measurement will be possible by using pH-FET sensors even for sample solutions of weak buffer ability.
| Original language | English |
|---|---|
| Journal | IEEJ Transactions on Sensors and Micromachines |
| Volume | 127 |
| Issue number | 8 |
| Publication status | Published - 2007 |
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Keywords
- Automation
- Differential pH sensor
- ISFET
- pH
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Mechanical Engineering
Cite this
Automation of pH measurement using a flow-through type differential pH sensor system based on pH-FET. / Mohri, Satoshi; Nakamura, Michihiro; Naruse, Keiji.
In: IEEJ Transactions on Sensors and Micromachines, Vol. 127, No. 8, 2007.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Automation of pH measurement using a flow-through type differential pH sensor system based on pH-FET
AU - Mohri, Satoshi
AU - Nakamura, Michihiro
AU - Naruse, Keiji
PY - 2007
Y1 - 2007
N2 - Automatic pH measurement system was developed by using a flow-through type differential pH-FET sensor. The system was operated by repeating 60 sec cycle consisting of 36 sec of washing period, 4 sec of moving period, and 20 sec of measuring period. In washing period, the differential pH-FET sensor was washed with baseline solution. In measuring period, about 50 μ1 of sample solution was withdrawn to the space around a measurement pH-FET, and the change of differential source potential was measured. Absolute values of error for nine sample solutions with weak buffering ability were less than 0.146 pH, and were 0.071 pH in average. From this experiment, it was suggested that high-speed and automated pH measurement will be possible by using pH-FET sensors even for sample solutions of weak buffer ability.
AB - Automatic pH measurement system was developed by using a flow-through type differential pH-FET sensor. The system was operated by repeating 60 sec cycle consisting of 36 sec of washing period, 4 sec of moving period, and 20 sec of measuring period. In washing period, the differential pH-FET sensor was washed with baseline solution. In measuring period, about 50 μ1 of sample solution was withdrawn to the space around a measurement pH-FET, and the change of differential source potential was measured. Absolute values of error for nine sample solutions with weak buffering ability were less than 0.146 pH, and were 0.071 pH in average. From this experiment, it was suggested that high-speed and automated pH measurement will be possible by using pH-FET sensors even for sample solutions of weak buffer ability.
KW - Automation
KW - Differential pH sensor
KW - ISFET
KW - pH
UR - http://www.scopus.com/inward/record.url?scp=34548292386&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34548292386&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:34548292386
VL - 127
JO - IEEJ Transactions on Sensors and Micromachines
JF - IEEJ Transactions on Sensors and Micromachines
SN - 1341-8939
IS - 8
ER -