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研究了用浊度法对煤焦中总硫的测定条件及方法 ,Ba2 + 和SO2 - 4在酸性环境中 ,Tritonx - 80 -OP混合液存在的条件下 ,能形成较稳定的均匀分散体系 ,在波长 4 2 0nm处 ,用 3cm比色皿 ,采用可见分光光度计测定吸光度[1] ,显色时间为 2 0min ;检测范围为 0 .0 6～ 1.0 0mg/50ml;SO2 - 4回收率 90 .0 %～ 10 3.3% ;样品测定结果标准偏差S为 0 .0 14～ 0 .0 15。
The turbidimetric method was applied to the determination of total sulfur in coal char. Under the condition of Tritonx - 80 -OP mixed solution, Ba2 + and SO2 - 4 could form stable and uniform dispersion in acidic environment. At a wavelength of 4200nm, using a 3cm cuvette, the absorbance was measured by visible spectrophotometer [1], the color development time was 20min, the detection range was 0.06 ~ 1.0 0mg / 50ml, the recovery rate of SO2 - 4 .0% ~ 10 3.3%; the standard deviation of the determination results of the sample is 0.014 ~ 0.015.