Based on the principle that the refractive index of solution is proportional to the concentration, the designed refractive index instrument for sugar content detection has the following characteristics:
1, the operation is simple and quick, and the measurement result is clear and accurate.
2, exquisite structure, beautiful appearance
3, easy to carry and durable
Mainly used for:
1, determine the sugar content of fruits and other fruits.
2. Determine the maturity of sugary plants and the effect of seed selection and fertilization by measuring their sugar content.
3. Food processing, fruit cannery, brewery, beverage factory, etc. Used for product quality inspection of raw materials when they enter the factory or during production and when they leave the factory.
4, colleges and universities, scientific research units and other scientific research and teaching purposes.
Specification parameters:
B 10 /B 10T measuring range: 0 ~ 10% accuracy: 0. 1% temperature compensation: 10℃ ~ 30℃
The working principle of sugar meter: when light enters another medium from one medium, it will be refracted, and the sine ratio of incident angle is constant, which is called refractive index. The content of soluble solids in fruit and vegetable juice is directly proportional to the refractive index under certain conditions (the same temperature and pressure), so the concentration (sugar content) of fruit and vegetable juice can be obtained by measuring the refractive index of fruit and vegetable juice. Commonly used instruments are hand-held refractometer, also known as sugar mirror and hand-held sugar meter. By measuring the soluble solid content (sugar content) of fruits and vegetables, we can know the quality of fruits and vegetables and estimate the maturity of fruits. Hand-held sugar meters are generally cylindrical.
Instructions for use of hand-held sugar refractometer
(a), the instrument structure
① Refractive prism ②, cover ③, calibration bolt ④, optical system pipeline ⑤, eyepiece (visibility adjusting ring)
Usage: Open the cover plate.
② Carefully wipe the detection prism with a soft cloth.
(1). Take a few drops of the solution to be tested, put it on the detection prism, and gently close the cover plate to avoid bubbles and make the solution spread all over the prism surface. Aim the light entry plate of the instrument at the light source or bright place, observe the field of view through the eyepiece, and turn the eyepiece to adjust the handwheel.
⑤. Make the blue-white boundary of the field of vision clear. The scale value of the dividing line is the concentration of the solution.
Calibration and temperature correction: the instrument needs to calibrate the zero point before measurement. Take a few drops of distilled water, put it on the detection prism, and turn the zero adjustment screw.
③ Adjust the dividing line to 0% of the scale. Then clean the detection prism for detection. Some models of instruments need to use standard solution instead of distilled water when calibrating.
Another method is (only applicable to the determination of sugar content): add (or subtract) the temperature correction value to the value read at ambient temperature with a temperature correction table to get an accurate value.
Precautions: This instrument is a precision optical instrument, and the following matters should be paid attention to in use and maintenance:
1. Be careful when using it, use it in strict accordance with the instructions, do not loosen the connecting parts of the instrument at will, do not fall or collide, and do not violently vibrate.
2. After use, it is forbidden to directly put it into water for cleaning, and wipe it with a clean soft cloth. For optical surfaces, there should be no scratches or scratches.
3. The instrument should be stored in a dry place without corrosive gas.
4. Avoid the loss of spare parts.