光照及温度对N-二甲基亚硝胺和N-二乙基亚硝胺降解的影响研究

Influence of light and temperature on degradation of N-nitrosodimethylamine and N-nitrosodiethylamine

摘要: 文章研究了光照及温度对N-二甲基亚硝胺(NDMA)和N-二乙基亚硝胺(NDEA)降解的影响。试验结果表明，NDMA和NDEA在光照作用下迅速降解，初始浓度分别为60.88和60.06 ng·mL^-1的NDMA和NDEA在光照4 h后浓度变为10.88和7.57 ng·mL^-1，分别下降了82.13%和87.39%。方差分析结果表明，光照对NDMA和NDEA的降解有显著性影响(P < 0.05)。在4~50℃温度范围内，NDMA和NDEA降解不明显；温度大于50℃时对NDMA和NDEA的降解有显著影响(P < 0.05)。

Abstract: Influence of light and temperature on degradation of N-nitrosodimethylamine (NDMA) and N-nitrosodiethylamine (NDEA) was studied. The result showed that NDMA and NDEA degraded rapidly under the light. The concentration of NDMA and NDEA decreased from 60.88 and 60.06 ng·mL^-1 to 10.88 (82.13%) and 7.57 (87.39%) ng·mL^-1, respectively, when exposing to sun light for 4 h. The analysis of variance showed that the light had a significant influence on degradation of NDMA and NDEA (P < 0.05).The degradation of NDMA and NDEA was not significant from 4 to 50℃, but significant when the temperature was higher than 50℃ (P < 0.05).