对于有机物质进行元素定性分析,—般的办法是先用金属钠和试样在一起加热。试样中如含氮则产生氰化钠,硫生成硫化钠,卤素生成卤化钠。而后再进行验证试验,以确定试样中是否含有氮、硫或卤素。金属钠是一个活泼金属,价值较昂,平常贮存在煤油里。使用时要切去表面上的杂质,手续比较麻烦。有时候因为操作不慎或者试样性质的关系,有发生伤害及灾害的危险。而且牠的有效范围有限,在检查乙基溴,二甲苯胺,氮苯,氮萘,甲基橙,偶氮苯等化合物时, For elemental qualitative analysis of organic matter, the usual approach is to first heat the metal sodium together with the sample. Samples containing nitrogen such as sodium cyanide, sulfur generated sodium sulfide, halogen generated sodium halide. Then verify the test to determine whether the sample contains nitrogen, sulfur or halogen. Sodium metal is a lively metal, more expensive, usually stored in kerosene. When used to cut the surface of impurities, procedures more trouble. Sometimes because of careless operation or the nature of the sample, there is the danger of injury and disaster. And its effective range is limited, in the inspection of ethyl bromide, xylaniline, benzene, nitrogen naphthalene, methyl orange, azobenzene and other compounds,