Instrument introduction:Lambda365 dual-beam ultraviolet-visible spectrophotometer can provide light wave scanning range, including ultraviolet (wavelength 190~380 nm) and visible and near infrared spectroscopy (wavelength 380~1100 nm). There are two detectors (photodiodes), and the sample and reference beam are measured at the same time. The reference beam intensity is taken as 100% transmittance (or 0 absorbance), and the measured value displayed is the ratio of the two beam intensities. The main principles are the valence electron energy level transition theory and the Lambert-Beer law of light absorption. The qualitative and quantitative analysis of compounds can be carried out through the UV-VIS absorption spectra of chromophores of organic or inorganic compounds. The sample types are liquid and solid, and are generally dilute liquid solutions.

Technical parameter:

Spectral bandwidth: 0.5,1,2,5,20nm optional

Automatic degree: automatic wavelength

Wavelength range: 190-1100nm

Light absorption range: ±3A

Stray light: <0.05%T; <0.03%T (340nm); <1%T

Bandwidth: 1nm

Wavelength accuracy: ±0.2nm

Wavelength repeatability (ten measurements): ±0.02nm

Photometer accuracy@1A: ±0.005A

Photometer repeatability@1A: ±0.001A

Photometer drift@1A, 500nm: 0.001A/hour

Noise (RMS) 1mm slit: 0.0001A@300nm