Each atom has its own energy-level structure and absorbs or emits specific spectral lines during transitions. Measuring these characteristic lines identifies chemical composition and relative abundance, a method called spectroscopic analysis. This experimental kit uses a cooled tungsten-halogen source as the reference and a miniature spectrometer as the detector. Adding a transmission module to the source allows measurement of liquid absorbance and calculation of solution concentration, or transmittance measurements of transparent materials such as filters. Adding a reflection module allows measurement of surface-reflection spectra and calculation of material color parameters.
| Parameter | Value |
| Fiber-optic spectrometer - Wavelength range | 350nm-1050nm |
| Fiber-optic spectrometer - Resolution | ~1nm |
| Air-cooled tungsten-lamp light source - Wavelength range | 400 nm-2000 nm |
| Air-cooled tungsten-lamp light source - Cooling method | Fan |
| Quartz optical fiber | Length 5cm, Φ600μm |
| Reflectance module | Uses a distinctive L-shaped structure. |
| Transmittance module | Uses a distinctive sample slot shaped like the character zhong. |
| Standard white reference | Protective housing made of aluminum. |
Observe emission spectra of different sources; measure solid-sample transmittance; measure liquid-sample absorbance and concentration; measure reflection spectra and obtain colorimetric parameters. Experiment 1: Observe output spectra of sources such as sunlight and LED lamps. LED-lamp spectral distribution. Experiment 2: Obtain central wavelength, transmittance, full width at half maximum, and other optical parameters from a transmittance curve. Filter characterization. Experiment 3: Measure liquid-sample concentration from absorbance curves using the Lambert-Beer law. Potassium-permanganate concentration measurement. Experiment 4: Use standard illuminant A as a reference and measure the sample's reflectance curve to obtain colorimetric parameters. Paper chromaticity diagram under standard illuminant A.
Simple modular structure with versatile instrumentation; varied experiments for measuring and analyzing different spectra; strong expandability, with additional components enabling more measurements; suitable for both teaching and research experiments.
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