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本文提出了基于化学反应与压电传感相结合的化学频移法,导出了相应的理论公式。证明化学反应产生的频移遵循公式△f=-4.6×10~6hmf~2Dδ~(-1)tkC_A,式中f,h为晶体基频及泛频阶次,m,D为感应物克式量及扩散系数,δ扩散层厚,t响应时间,C_A被测物浓度,k为与化学反应计量关系有关的系数。本文为溶液中微/痕量组分测定开辟了新的方法体系,以安乃近为实例做了应用报道。
In this paper, a chemical shift method based on the combination of chemical reaction and piezoelectric sensing is proposed, and the corresponding theoretical formula is derived. It is proved that the frequency shift produced by the chemical reaction follows the formula △ f = -4.6 × 10 ~ 6hmf ~ 2Dδ ~ (-1) tkC_A, where f and h are the fundamental frequencies of the crystal and the ubiquitous order, m and D are the inductive compounds Volume and diffusion coefficient, δ diffusion layer thickness, t response time, C_A concentration of the analyte, k is the coefficient related to the chemical reaction measurement. This article has opened up a new method system for the determination of micro / trace components in solution.