| 薛梅,曹端林,周霖,吴霏,郝彩丽,高志谨,刘洋,李永祥.化学通报,2016,79(4):338-343. |
| 钝感炸药DNP和NTO的酸性解离常数的测定方法研究 |
| A Study on Acid Dissociation Constant Determination Methods of Insensitive Explosives DNP and NTO |
| 投稿时间：2015-07-06 修订日期：2015-09-04 |
| DOI： |
| 中文关键词: 分析化学 3,4-二硝基吡唑(DNP) 3-硝基-1,2,4-三唑-5-酮(NTO) 解离常数 pKa值 |
| 英文关键词:Analytical chemistry 3,4-dinitropyrazole(DNP) 3-nitro-1,2,4-triazol-5-one (NTO) Dissociation constants pKa value |
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| 中文摘要: |
| 采用滴定法、半中和法、pH值法、电导率法、紫外分光光度法五种方法,测定了3,4-二硝基吡唑(DNP)和3-硝基-1,2,4-三唑-5-酮(NTO)两种钝感炸药的酸性解离常数pKa值,并对不同方法所测的结果进行比较和讨论,对不同的测定方法做研究。结果表明：滴定法、半中和法、紫外分光光度法三种方法适合测定DNP类物质的pKa值,实验结果基本一致,标准偏差SD<5%；滴定法、pH值法更适合测定NTO类物质的pKa值,实验结果基本一致,标准偏差SD<4%。DNP的pKa值大于NTO的pKa值,即DNP比NTO的酸性弱,对设备等的腐蚀作用较小,更适宜用作熔铸炸药载体。根据这五种酸性解离常数测定方法的优缺点,对不同性质的物质在测定pKa值时,可选用的合适方法进行了总结。 |
| 英文摘要: |
| The dissociation constants (pKa) of two insensitive explosives 3,4-dinitropyrazole(DNP) and 3-nitro-1,2,4-triazol-5-one (NTO), were determined by five methods including titration method, half neutralization method, pH method, electrical conductivity method and UV- spectrophotometry. The deferent methods and the results were compared and discussed. The results show that titration method, half neutralization method and UV- spectrophotometry are more suitable to determine the pKa of DNP, the standard deviation SD<5%; titration method and pH method are more suitable to determine the pKa of NTO, the standard deviation SD<4%. DNP’s pKa value is greater than NTO’s, which means acidity of DNP is more weak、DNP have small causticity to the equipments and DNP is preferably used as melt-cast explosive carrier. The appropriate methods for different chemical substances to determine pKa were summarized separately, which based on the advantages and disadvantages of the five methods. |
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