Product Description:UV-Vis spectrophotometer is an analytical instrument based on the principle of UV-Vis spectrophotometry, which uses the radiation absorption of substance molecules to the UV-Vis spectral region to analyze. It is mainly composed of light source, monochromator, absorption cell, detector and signal processor. The function of the light source is to provide a stable continuous spectrum of sufficient intensity. The ultraviolet light region usually uses a hydrogen lamp or a deuterium lamp. The visible light region usually uses a tungsten lamp or a tungsten halogen lamp. The function of the monochromator is to split the composite light emitted by the light source and separate the monochromatic light of the desired wavelength from it. There are two types of dispersive elements: prisms and gratings. A glass absorption cell is used for measurement in the visible region, and a quartz absorption cell is required for measurement in the ultraviolet region. The function of the detector is to detect the intensity of the transmitted light through the photoelectric conversion element, and convert the optical signal into an electrical signal. Commonly used photoelectric conversion elements include photocells, photomultiplier tubes and photodiode array detectors.
Product category:
There are many classification methods of spectrophotometers: according to the optical path system, it can be divided into single-beam and double-beam spectrophotometer; according to the measurement method, it can be divided into single-wavelength and double-wavelength spectrophotometer; Scanning detection and diode array full spectrum detection.
Working principle:
The UV-Vis absorption spectrum of a molecule is the absorption spectrum generated by the electron energy level transition after some groups in the molecule absorb UV-visible radiation. Since various substances have different molecules, atoms and different molecular spatial structures, their absorption of light energy will not be the same. Therefore, each substance has its unique and fixed absorption spectrum curve, which can be determined according to the absorption The level of absorbance at certain characteristic wavelengths on the spectrum is used to identify or determine the content of the substance, which is the basis of spectrophotometric qualitative and quantitative analysis.
Product structure and function:
It consists of five parts: light source, monochromator, absorption cell, detector and signal display system.
Light source: It is a device that provides incident light that meets the requirements. There are two types of heat radiation light sources and gas discharge light sources. Thermal radiation light sources are used in the visible light region, generally tungsten lamps and tungsten halogen lamps, with a wavelength range of 350~1000nm; gas discharge light sources are used in the ultraviolet light region, generally hydrogen lamps and deuterium lamps, with a continuous wavelength range of 180~360nm.
Monochromator: The function is to decompose the composite light generated by the light source into monochromatic light and separate the required monochromatic light beam, which is the heart part of the spectrophotometer.
Absorption cell: also known as cuvette, used for holding test solution for absorbance measurement. Its bottom and two sides are frosted glass, and the other two sides are optically transparent surfaces. In order to reduce the reflection loss of light, the optical surface of the absorption cell must be completely perpendicular to the beam direction. According to the material, it can be divided into glass cell and quartz cell, the former is used for visible light region measurement, and the latter is used for ultraviolet light region.
Detector: It is a device that converts optical signals into electrical signals. When measuring absorbance, it does not directly measure the light intensity passing through the absorption cell, but converts the light intensity into a current signal for testing. This photoelectric conversion device is called a detector. .
Signal display system: It is a device that amplifies the signal output by the detector and displays it.
Features:
1. High sensitivity.
2. Be selective.
3. High accuracy.
4. Wide application.
5. Use a wide range of concentrations.
6. The analysis cost is low.
7. Easy to operate.
8. Fast analysis speed.
Main Cooperation Materials Manufacturers: CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC
Main Export Countries & Areas: Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.
Raytekoptics Extra value added services offered: 1). Optical workcraft & process solution design; 2). Rough processing raw materials; 3). Semi finishing raw materials; 4). Fabricate custom sizes and shapes; 5). Design and supply custom coatings; 6). Modify and resurface customer supplied materials; 7). Drill holes, notch glass and provide beveled substrates; 8). Precision polish optics with non-standard aspect ratios;
Payment Method: by T/T or Western Union. Delivery time: 7-10 days. Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offersquality warranty for our optics products with "3R" policy. For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.
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