摘要
以在ＡＴ切型，Ａｕ做电极的石英振子上涂覆适当厚度的Ｌ（＋）抗坏血酸为敏感膜，制作气敏元件．实验表明，该元件对微量ＮＨ３（＜３．３×１０－６ｍｏｌ／Ｌ）具有很高的频率响应和灵敏度；对８．２×１０－５ｍｏｌ／Ｌ的Ｈ２，ＣＯ，ＣＨ４，Ｃ４Ｈ１０及８．２×１０－７ｍｏｌ／ＬＨ２Ｓ感度很低，有良好的选择性．
L(+ ) ascorbic acid film with a suitable thinkness was coatted on the AT cut quartz crystal with An as the electrode, with which the gas sensors were preprated. The sensor has high freqency changes for NH3 gas (<3. 3 × 10-6 mol/L) and high sensitivity, but the sensitivity is low for 8. 2 ×10-5 mol/L H2, CO, CH4, C4H10 and 8. 2 × 10-7 mol/L H2S gases, so the selectivity is good.
出处
《吉林大学自然科学学报》
CAS
CSCD
1996年第1期51-54,共4页
Acta Scientiarum Naturalium Universitatis Jilinensis
关键词
石英振子
氨
气敏元件
维生素C
quartz oscillator. sensor to NH3 gas, L(+ ) ascorbic acid
