lingzhong发表:大家的UV定期校准项目有哪些?下列有何异同? 1. SPECTRAL SLIT WIDTH (if applicable) When using an instrument on which the slit-width is variable at the selected wavelength, the slit-width must be small compared with the half-width of the absorption band but it must be as large as possible to obtain a high value of I0. Therefore, a slit-width is chosen such that further reduction does not result in a change in absorbance reading.