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以 36° -YXLiTaO3为基底的双通道声表面波 (SH -SAW)液相金属离子传感器 ,在LabView测试平台下采用流动注射的方法研究了该系统在液相金属离子检测和分析中的原理和应用。实验表明 ,传感器稳态的输出频率反应了待测溶液的电导率 ,数据经拟和处理 ,误差 <0 2 4 % ;传感器的检测下限为 10 - 5mol/L ;对于两种金属离子的混合溶液 ,传感器的瞬态响应反映了待测溶液中所含的离子成份 ,采用偏相关分析 (PLS)算法可以有效识别待测溶液中离子成份的比例 ,识别误差 <3%。研究表明 ,通过进一步的优化设计 ,这种新型的液相金属离子分析仪器具有重复性好、灵敏度高、体积小和适合在线实时检测等方面的优点。
The SH-SAW liquid metal ion sensor based on 36 ° -YXLiTaO3 was used to study the principle and method of flow injection in the liquid metal detection and analysis under the LabView test platform application. The experimental results show that the steady - state output frequency of the sensor reflects the conductivity of the solution to be measured. The data is simulated and processed with the error of <0 2 4%. The detection limit of the sensor is 10 - 5 mol / L. For the mixed solution of two metal ions The transient response of the sensor reflects the ions contained in the solution to be measured. The partial correlation analysis (PLS) algorithm can effectively identify the proportion of ions in the solution to be measured, and the recognition error is less than 3%. The research shows that the new liquid metal ion analysis instrument has the advantages of good repeatability, high sensitivity, small volume and suitable for on-line real-time detection through further optimization design.