At sulfur dioxide adopt sample system, use ethylene glycol replace air treating of sulfruic acid do drier and do away with grain and oil dirty inside of air, method more economy,simple and safety.

• 在二氧化硫采样系统中,用乙二醇代替曝气处理的浓硫酸做干燥剂和去除空气中的尘粒和油污,方法更经济、简便、安全。