单基发射药中二苯胺的极谱法测定  

Polarographic Determination of Diphenylamine in Single Base Propellants

作　　者：张翠梅[1] 

机构地区：[1]中北大学分校应用化学系,山西太原030008

出　　处：《火炸药学报》2007年第1期32-35,共4页Chinese Journal of Explosives & Propellants

摘　　要：将单基发射药亚硝化后用单扫描方波极谱法测定溶液中的二苯胺（DPA）含量，用丙酮溶解单基发射药试样，使用组成与待测样品相同的单基标准样品作工作曲线。在5％丙酮／0．025mol·LH^-1H2SO4／5．0×10^-3mol·L^-1NaNO2底液中，测量DPA亚硝化产物在电位为-0．59V（vs．SCE）的峰电流。结果表明，峰电流与DPA浓度在3．5×10^-6～1．0×10^-4mol·L^-1范围内具有良好的线性关系（r=0．999）。测定了单基发射药8／1-12样中的DPA含量，与溴化法测定结果一致。试验的加标回收率达98．2％～102．4％。Diphenylamine（DPA） contents in single base propellants were determined by means of a single-sweepsquare-wave polarography after the treatment of nitrosation of DPA. The standard curve was drawn up using the solution of single base propellants dissolved in propanone as standard sample whose composition is similar to unknown sample. In a base solution of 5% propanone/0. 025 mol/L H2SO4/5. 0 × 10^-3 mol/L NaNO2,a peak current of nitrosation products of DPA was measured at -0. 59 V （vs. SCE）. The results show that the peak current is linear with the concentration of DPA in the range of 3.5 × 10^-6 mol/L-1.0 × 10^-4 mol/L （r=0. 999）. The content of DPA in single base propellants 8/1-12 determined by the method above is consistent with the results of bromination titration method. The recovery ratio of experiment is up to 98.2%-102.4%.

关 键 词：分析化学 单基发射药 DPA 亚硝化 方波极谱法 

分 类 号：TQ562.072[化学工程—炸药化工]