Kjeldahl Nitrogen Analyzer/Soxhlet Extractor/Sti manufacturer / supplier in China, offering SPD620g/SPD620 Digestion Instrument: Application in Kjeldahl Nitrogen Analyzer Pretreatment, SPD620g Digestion Instrument. Reflux Design: Ensure The Integrity of Sample Digestion and Improve Experimental Efficiency., SPD620 Digestion Instrument. It Is Suitable for Sample Digestion Before Nitrogen/Protein Analysis of Soil, Grain and Feed in Food, Medicine and so on.