摘要
本文提出了连续测定气体麻醉剂中氧(O_2)和氧化亚氮(N_2O)的气体薄层电极库仑法。在所选定的条件下,镀以薄层钯的气体薄层电极在O_2—N_2O混合气体中采样后以测得两个分辨的电流峰,峰电量与被测组份浓度在0—100％的整个浓度范围内皆有良好的线性关系。这一方法的主要优点是:采样速度快(<5s)、温度系数低(-0.1～-0.3％/℃)、稳定性好、灵敏度和选择性较高,而且装置简单,便于连续监测O_2和N_2O的浓度。
A novel electroanalytical method has been developed for determining consecutively the composition of oxygen and nitrous oxide in O_2-N_2O gas mixture(gas anesthetic).The method is based on bulk electrolysis principle of gas thin-layer elctrode(GTLE). As a result of exhaustive electrolysis of O_2 and N_2O within pores of GTLE, the reduction peaks of both components on voltammogram at Pd-plated GTLE are well-defined and well-separated under appropriate experimental conditions. Quantity of charge consumed in exhaustive electrolysis of each constituent(Q) was obtained by integration of correlative peak area. The linearities of responses to both components were found to be satisfactory over the rsnge of 0—100％. The merits of this method are: fast sampling(<5 sec), low temperature coefficient of Q (-0.1—-0.3％/℃ ), good stability,higher sensitivity and selectivity. Besides, the method is very simple, and can be used for consecutive monitoring the concentrations of O_2 and N_2O.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1989年第9期774-777,共4页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
关键词
麻醉气体
氧
氧化亚氮
库仑
GTLE
Gas thin-layer electrode
Hydrophobic gas-permeable membrane
Bulk (Exhaustive) electrolysis
Coulometric analysis
Oxygen
Nitrous oxide
