In this paper, the thermoreactor was applied for the NR latex digestion which based on using oxidizing agent in combination with heat. This technique could be used for decomposition of organic and biological matrix in NR latex before phosphate determination utilized molybdenum blue spectrophotometry. Total phosphate in NR latex was found to be 0.54 mgg-1(RSD = 1.4%, n = 11). Compared with Kjeldahl technique, this proposed method using thermoreactor is simpler, cheaper and faster.