The commonly used instrument in the fruit sugar meter is a hand-held refractometer, also known as a sugar mirror and a hand-held sugar meter. By measuring the soluble solid content (sugar content) of fruits and vegetables, the quality of fruits and vegetables can be understood, and the maturity of fruits can be roughly estimated.
1. 목적 및 원리: 사용 a 휴대용 굴절계 to measure the total soluble solids content in fruits and vegetables, which can roughly indicate the sugar content of fruits and vegetables. The phenomenon of refraction occurs when light enters another medium from one medium, and the ratio of the sine of the incident angle is constant, and this ratio is called the refractive index. 함량 의 용해성 고형분 in 과일 및 야채 주스 is 비례 to 굴절 지수 under certain conditions (동일 온도 및 압력), so the 농도 (설탕 함량) of 과일 및 야채 주스 can be 얻은 by 측정 the 굴절 인덱스 of 과일 및 야채 주스.
2. 약물 및 장비 필요 for the 실험:
1. 과일 샘플
2. 증류 물
3. 비커 % 2c 스포이드 % 2c 종이 롤 % 2c 핸드 헬드 과일 설탕 미터
3. 작업 단계:
1. 열기 덮개 의 휴대용 과일 설탕 미터, 및 신중하게 건조 그의 유리 표면 의 프리즘 with 깨끗한 거즈 또는 롤 종이. 넣기 2 드롭 의 증류 물 켜기 프리즘 유리 표면 및 덮개 with a 덮개 슬립.
2. In a horizontal state, observe from the eye contact, and check whether the boundary line between light and dark in the field of vision is on the zero line of the scale. If it does not coincide with the zero line, turn the scale adjustment screw so that the dividing line just falls on the zero line.
3. Open the cover, dry the water with gauze or roll paper, then drop 2 drops of fruit and vegetable juice on the prism glass surface as above, observe, and read the scale on the boundary line between light and dark in the field of vision, which is the solubleness in fruit and vegetable juice. Solid content ( percent ) (approximate content of sugar). repeat three times.
