Wei W Z, Hu C W, Wei K M, Nie L H, Yao S Z
Department of Chemistry and Chemical Engineering, Hunan University, Changsha.
Yao Xue Xue Bao. 1993;28(10):782-7.
According to the response properties of piezoelectric crystal quartz sensors to the solution conductivity the frequency shift response was derived to show a linear dependence on the concentrations of vitamin B1 (VB1) and vitamin C (VC). This was experimentally verified and a calibration model for simultaneous determinations of the two vitamins was established. The usefulness of the technique was evaluated by quantitation of mixtures of unknown composition using common multiple linear regression (MLR) and partial least squares (PLS). The average relative standard deviations for six samples were 4.46% for VB1 and 6.63% for VC with MLR; and 1.97% for VB1 and 2.74% for VC with PLS, respectively.
根据压电晶体石英传感器对溶液电导率的响应特性，推导了频率偏移响应，结果表明其与维生素B1（VB1）和维生素C（VC）的浓度呈线性关系。通过实验对此进行了验证，并建立了同时测定这两种维生素的校准模型。使用普通多元线性回归（MLR）和偏最小二乘法（PLS）对未知成分混合物进行定量分析，以此评估该技术的实用性。采用MLR时，六个样品中VB1的平均相对标准偏差为4.46%，VC为6.63%；采用PLS时，VB1的平均相对标准偏差为1.97%，VC为2.74%。
