此方法用合适的波长和灵敏度程序检测，以抑制和排除杂质峰的干扰；
A programmable multiwavelength detector is used to change both wavelength and sensitivity of-detection automatically in order to optinize the detection of each vitamin.
对于不同的样品，选择合适的检测波长至关重要，不仅可以提高检测灵敏度，也可使线性范围增大。
It is very important to select suitable detection wavelength for different samples, which cannot only improve the detection sensitivity, but also enlarges the linear scale of detector.
基于理论分析，得出了此传感结构的应变与布拉格波长相对位移量之间的关系，给出了应变灵敏度的解析表达式。
The relation between relative shift of Bragg wavelength and the strain applied on the sensor is derived theoretically, and the analytical expression of strain sensitivity is also given.
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