GC/MS气质联用法分析轮胎橡胶气味

摘要该研究致力于探索一种可靠的检测轮胎橡胶中典型异味物质的方法。采用顶空法（HS）进样，结合气相色谱-质谱仪（GC/MS）进行定性和定量分析。主要分析了轮胎橡胶气味中的七种物质，分别是双异丁烯，甲基异丁基甲酮，苯乙烯，间二异丙苯，萘，苯并噻唑，对叔丁基苯酚。方法首先对 GC/MS 的进样条件及顶空平衡温度，顶空平衡时间，液体体积和加盐量进行优化，得到最佳前处理条件，再在最优条件下对标准工作溶液进行检测。结果表明，七种物质在线性范围内均具有良好的线性相关性，其相关系数均大于 0。99，方法的检出限为 0。00018~0。0438 mg/kg ；七种物质的 RSD 在 2。43~9。91% 之间；七种物质的加标回收率在 81。67~124。36%之间。该方法能适用于轮胎橡胶中异味物质的检测。73773

毕业论文关键词轮胎橡胶顶空-气相色谱质谱联用气味

Determination of the odorants in tire rubber by headspace gas chromatography-mass spectrometry

Abstract

A detection method of the odorous composition in tire rubber was described in this paper。 Quantitative and qualitative analysis were carried out by headspace (HS) and gas chromatography - mass spectrometry (GC/MS)。 Seven odorous compounds were analysised in this paper(1,3-Diisopropylbenzene, 2,4,4-Trimethyl-1-pentene, Methyl isobutyl ketone, Styrene, Naphthalene, Benzothiazole, 4-tert-Butylphenol)。 The sampling condition of GC/MS , headspace equilibrium temperature, headspace equilibrium time, volume of liquid and salt additions were optimized。 Under the

optimal conditions, the standard working solutions were tested。 The results show that the correlation coefficients of seven compounds were not less than 0。99, the limits of detection of each component was less than 0。0438 mg/kg, the relative standard deviation(RSD) was 2。43 ~ 9。91%, and the addition standard recovery was 81。67 ~ 124。36%。 The method is accurate and sensitive,so it's quite suitable for determination

of the odorants in tire rubber。

Keywords : tire rubber headspace-gas chromatography/mass spectrometry odour

1 绪论 1

1。1 轮胎橡胶的发展现状 1

1。2 气体预处理方法 1

1。2。1 固相微萃取（SPME） 1

1。2。2 静态顶空法 2

1。2。3 吹扫捕集法（动态顶空法） 4

1。3 气相色谱-质谱联用检测技术 5

1。3。1 气相色谱分析技术 5

1。3。2 质谱分析 5

1。3。3 气相色谱-质谱联用 6

1。4 本研究的主要内容 7

1。4。1 研究意义 7

1。4。2 研究内容 7

2 实验部分 8

2。1 实验仪器与试剂 GC/MS气质联用法分析轮胎橡胶气味:http://www.youerw.com/huaxue/lunwen_83472.html