【摘要】 通过测定间二氯苯中的杂质含量得到间二氯苯的纯度。分别采用高效液相色谱法(HPLC–UVD)和气相色谱法(GC–FID)测定间二氯苯中主要杂质邻、对二氯苯的含量,结果表明两种方法所得杂质含量一致;用高效液相色谱法(HPLC)测定间二氯苯中杂质苯的含量,卡尔费休(Karl Fischer)法测定水分含量,热重法(TGA)进行灰分测定,电感耦合等离子体质谱(ICP–MS)法测定无机杂质含量。最终确定间二氯苯的纯度为99.60%,扩展不确定度为0.03%(k=2)。该方法测定结果准确可靠,具有可溯源性。更多还原

【Abstract】 The purity of m-dichlorobenzene was obtained by determination of the impurity content in m-dichlorobenzene sample. High performance liquid chromatography(HPLC–UVD) and gas chromatography(GC–FID) method were employed to determine the main impurities,the results indicated that o-dichlorobenzene and p-dichlorobenzene content detected by two methods were consistent. HPLC(UVD) method was used to determine the content of benzene, the moisture content was obtained by Karl Fischer method, TGA method was used for ash analysis and ICP–MS method was used for determining the inorganic impurities. The purity of m-dichlorobenzene was 99.60% with expanded uncertainty of 0.03%(k=2). The result determinied by the method is accurate and has traceability.更多还原