Cleaning method 1. Wash with a mixture of ether and absolute ethanol (50% each). 2. If it is too dirty, use a special lotion to clean it. But the time should be short (10 minutes), and then rinse with water. Selection of cleaning agent Do not use detergents such as dish soap. So as not to affect the measurement. Note: All advanced spectrophotometers use patented quartz cuvettes, which are made of quartz body material through high temperature fusion bonding, which reduces pollution and has a longer service life. (The price is twice that of ordinary quartz cuvettes) Noteedit The cuvette is generally a rectangular parallelepiped, with ground glass on the bottom and both sides, and the transparent surface made of optical glass on the other two sides. The transparent surface is made of fusion, glass powder high temperature sintering and glue bonding. So pay attention to the following points when using:: 1. When taking the cuvette, you can only touch the ground glass on both sides with your fingers, and avoid touching the optical surface. At the same time, pay attention to handle with care to prevent the influence of external force on the contrast plate and damage after stress. 2. Any solution containing substances that corrode glass should not be stored in a cuvette for a long time. 3. Do not place the cuvette on a flame or electric furnace for heating or baking in a drying box; 4. When it is found that the inside of the cuvette is contaminated, clean it with absolute ethanol and wipe it clean in time. 5. Do not touch the transparent surface of the cuvette with hard or dirty objects. When holding the solution, the height is 2/3 of the cuvette. If there is residual liquid on the optical surface, it can be lightly absorbed with filter paper, and then wiped with lens paper or silk.