... a quantitative relation between fruit saccharinity,fruit acidity and near infrared specscopy.According to near infrared specscopy ... spectroscopy.2.Testing time:3 seconds 3.Data memory:6000(group data storing and data export)4.Tersting object:Apple ,pear , ... hami melon,watermelon, orange, juice peach,tomato, strawberry,papaya,mango longan and ...