Abstract: In many cases, we can easily confuse the 721 spectrophotometer with the 722 spectrophotometer. In fact, there is still a big difference between the two. So what is the difference between the 721 spectrophotometer and the 722 spectrophotometer? Let's look at the following together.
First, the introduction of 722 spectrophotometer722 spectrophotometry is suitable for quantitative analysis of the content of substances in the visible spectrum, and can be widely used in basic laboratories of factories, schools, metallurgy, agriculture, food, biochemistry, environmental protection, petrochemical, medical and health.
1. The instrument should be placed in a dry room at a temperature of 5 ° C to 35 ° C.
2. Place it on a firm and stable workbench during use, and avoid strong vibration or continuous vibration.
3, indoor lighting should not be too strong, and avoid direct sunlight.
4, the electric fan should not be directly blown to the instrument, so as not to affect the normal use of the instrument.
5. Try to stay away from high-intensity magnetic fields, electric fields, and electrical equipment that generate high-frequency waves.
6. The power supply to the instrument is 220 volts ± 10%, 49.5--50 Hz, and must be equipped with a good grounding wire. It is recommended to use a voltage regulator of more than 100W to enhance the anti-jamming performance of the instrument.
7. Avoid using it in places with corrosive gases such as hydrogen sulfide and sulfurous acid fluoride.
The basic principle of editing the spectrophotometer is that the substance in the solution is excited by light, and the effect of light absorption is generated. The absorption of light by the substance is selective, and various substances have their respective absorption spectra. Therefore, when a monochromatic light passes through a solution, its energy is absorbed and weakened, and the degree of light energy attenuation has a certain proportional relationship with the concentration of the substance, that is, it conforms to the colorimetric principle---Beier's law.
Second, the introduction of 721 spectrophotometerThe 721 spectrophotometer uses a classic optical path system and sophisticated manufacturing process to make the instrument's test accuracy and stability much better than traditional products; it is widely used in metallurgy, chemical, machinery, medicine, biology, agriculture, environmental protection, teaching. Other industries and fields. This instrument is also an essential inspection equipment in the QS certification of food factories and drinking water plants. Main technical indicators Wavelength range: 360∽800nm ​​Wavelength accuracy: 360∽600±3nm 600∽700±6nm 700∽800±8nm Transmittance accuracy: ±2.5% Transmittance repeatability: 0.5
Light Stand,Led Light Stand,Tripod Light Stand,Light Stand For Photography
SHAOXING SHANGYU FEIXIANG PHOTOGRAPHIC CO.,LTD , https://www.flying-photography.com