lead indicating paper,tetra base paper

Methods: HCHO was tested by phenyldrazine hydrochoride spectrophotometer and SO2 and H2S were tested by lead(Ⅱ) acetate paper.

方法:盐酸苯肼法定量甲醛,醋酸铅试纸法半定量二氧化硫和硫化氢,再综合考虑两种方法的检测结果来判断食品中吊白块的存在与否。