理化检验需用大量的有机试剂.尽管生产厂家对500ml瓶装的有机试剂加了内塑料盖,又加了外盖拧紧.并在外盖罩了一层密封膜,但挥发泄漏现象仍较严重.根据作者观察,苯、石油醚、乙醚等试剂,因其沸点低,每瓶每年平均约挥发45ml左右.三氯甲烷、丙酮等试剂每瓶每年平均约挥发25ml左右.化学试剂的挥发,不仅浪费了国家财富,也污染了环境,使人们的健康受到损害.作者将固体石蜡用蒸发皿盛放在水浴或 Physical and chemical tests require a large number of organic reagents.Although the manufacturers of 500ml bottles of organic reagents plus plastic cap, plus a cap tightening.And the outer cover of a layer of sealing film, but the volatile leakage is still serious.According to The author observed, benzene, petroleum ether, ether and other reagents, because of its low boiling point, the average bottle about the volatile about 45ml per year.Chloromethane, acetone and other reagents per bottle average about 25ml per year about volatile chemical reagents, not only wasted National wealth, but also pollute the environment, so that people’s health is impaired. The author of the solid paraffin with an evaporating dish in a water bath or