甲醛存在的条件下 ,酸性溶液中高锰酸钾可以氧化S2 - 产生很强的化学发光 .据此 ,采用流动注射技术 ,建立了利用高锰酸钾_甲醛_S2 - 化学发光体系测定硫的化学发光分析法 .方法的检出限为 2 3× 10 - 8g mL ,相对标准偏差为 1 2 % (6 0× 10 - 7g mLS2 - ,n =11) ,线性范围为 1 0× 10 - 7～ 1 0× 10 - 5g mLS2 - . In the presence of formaldehyde, potassium permanganate can oxidize S2 - to produce strong chemiluminescence in acid solution.According to the above, the chemisorption of sulfur using potassium permanganate _ formaldehyde _S2 - chemiluminescence system was established by flow injection technique The detection limit of this method was 23 × 10 -8 g mL with a relative standard deviation of 12% (60 × 10 -7 g mLS 2 -, n = 11). The linear range was 10 × 10 -7 ~ 1 0 × 10 - 5g mLS2 -.