摘要
本文研制了一套笔式结构的气味参考样品,可定量散发β-苯乙醇、甲基环戊酮、异戊酸、γ-十一碳酸内酯和β-甲基吲哚等五种标准气味物质。通过小型散发罩法对研制的气味参考样品进行测试,在设定条件下,β-苯乙醇、甲基环戊酮、γ-十一碳酸内酯、异戊酸和β-甲基吲哚的散发速率分别为242.84 μg/min、254.47 μg/min、226.34 μg/min、242.27 μg/min、161.86 μg/min;通过嗅觉测试对其气味强度评价,五组气味强度成对样本t检验中p值均大于0.05,气味强度无显著差异;经过50次嗅辨实验后,5支气味参考样品的散发速率相对标准偏差均小于5.0%。结果表明,研制的气味参考样品具有操作简单、散发稳定、可重复使用等特点,可用于嗅辨员的筛选。
A set of reference material with a pen-like structure was developed in this paper, which can quantitatively emit five standard odorants, including β-phenylethyl alcohol, methyl-cyclopentanone, isovaleic acid, γ-undecalactone and skatole. The odor reference material and its national standard test paper were tested by the emission test cell method. Under the condition of 23˚C ±2˚C, 50% ±10% RH, ventilation volume 0.52 L/min, the emission rates of five odor reference materials, β-phenylethyl alcohol, methyl-cyclopentanone, γ-undecalactone, isovaleic acid and skatole, were 242.84 μg/min, 254.47 μg/min, 226.34 μg/min, 242.27 μg/min, 161.86 μg/min respectively. The odor intensity of these five odor reference materials were evaluated by olfactory test. The p-values in the paired-samples T test of the odor intensity of the five groups were all greater than 0.05, and there was no significant difference in the odor intensity. The relative standard deviations of the emission rates of the five odor reference materials were all less than 5.0% after 50 olfactory experiments. The results show that the developed odor reference material has characteristics of convenient operation, stable emission rate, and reusability, which can be used for the screening panelists in the future.
出处
《环境保护前沿》
2022年第2期251-258,共8页
Advances in Environmental Protection
