... 3. Has the recycling auto-alarm function Automatic Kjeldahl Nitrogen Determination System Model: ZDDN-IIProduct introduction: It is ... Tester. It is used for testing nitrogen contains in grain, food, dairy products, drink, animal food, soil, medicine, settling, chemical ... choose.Specification: 1. Test varieties: grain, food, dairy products, drink, animal food, soil, medicine, settling, chemical and so ...