以高氯酸锌为催化剂，环氧乙烷和低碳醇反应生成窄分子量分布的乙二醇单低碳醇醚，确定了适宜的工艺条件。
Reaction of lower primary alcohol and ethylene oxide was studied by zinc perchlorate as catalyst, and the products are narrow distributed. The suitable process conditions have been established.
将商品次氯酸钙及其他钙的次氯酸盐、硫酸锌的出口退税率提高到5%。
Export refund rates for calcium hydrochloride, hypochlorites and sulphates of zinc would be raised to 5%.
用硝酸-高氯酸体系消解螺蛳和水葫芦样品，采用火焰原子吸收光谱法测定铜、锌、镍、铬，用石墨炉原子吸收光谱法测定铅、镉。
The samples of snail and hyacinth were digested by HNO_3-HClO_4, Cu, Zn, Ni, Cr were detected by flame AAS, and Pb, Cd by furnace AAS.
用硝酸-高氯酸体系消解螺蛳和水葫芦样品，采用火焰原子吸收光谱法测定铜、锌、镍、铬，用石墨炉原子吸收光谱法测定铅、镉。
The samples of snail and hyacinth were digested by HNO_3-HClO_4, Cu, Zn, Ni, Cr were detected by flame AAS, and Pb, Cd by furnace AAS.
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