| 温度、pH对水体中柠檬醛消除的影响 |
| The Effect of Tempurature and pH on the Elimination of Citral in Water |
| 投稿时间：2013-10-21 修订日期：2014-01-19 |
| DOI： |
| 中文关键词:柠檬醛 超高效液相色谱 温度 pH 消除速率 半衰期 |
| 英文关键词:Citral UPLC temperature pH the elimination rate half-life |
| 基金项目:福建省科技厅重点资助项目(2008N0118)；国家海洋公益性行业科研专项项目（201205021-4） |
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| 中文摘要: |
| 采用超高效液相色谱法（UPLC）测定初始浓度为8μL/L的柠檬醛在水中受温度、pH因子影响的消除规律。结果表明：在常温25℃、pH6.5蒸馏水中柠檬醛的浓度与时间成负相关，其直线回归方程为：y = -0.0447x + 7.29，R2 = 0.9687；半衰期（t1/2）为73.60h,在水中完全降解的理论值为163.08h。在0～30℃水温范围内，柠檬醛平均消除速率为V30℃>V 20℃>V 10℃>V 0℃，30℃水中柠檬醛的半衰期相对最短。在pH5.0～10.0水体中柠檬醛平均消除速率随pH升高而减小，即VpH5.0>VpH6.0>VpH7.0>VpH8.0>VpH9.0>VpH10.0,而在pH11.0水中柠檬醛消除速率反而增大（VpH6.0>VpH11.0>VpH7.0），说明柠檬醛在酸性和强碱性条件下不稳定。 |
| 英文摘要: |
| The effects of temperature and PH on the elimination of citral (the initial concentration 8µL/L) in water were determined using UPLC method. The results showed that the concentration of citral was negatively related to response time at the temperature of 25℃ and pH6.5, the linear regression equation was y = -0.0447x + 7.29 and the regression coefficient was 0.9687. Its half-life was 73.60 hours and the theoretical value for citral completely dissolved in water was 163.08 hours. In the temperature range of 0～30℃, the average elimination rate of citral increased with the increase of temperature, i.e., V30℃>V 20℃>V 10℃>V 0℃.The half-life of citral in 30℃ water was relatively the shortest. On the contrary, the average elimination rate of citral was inversely related to different pH (5.0～10.0), i.e., V（pH5.0）>V（pH6.0）>V（pH7.0）>V（pH8.0）>V（pH9.0）>V（pH10.0. However, the elimination rate in pH11.0 was relatively fast. In other words, citral was unstable under the acid and strong alkalinity condition. |
| 胡青,张倩,汪晓娟,林岗.2014.温度、pH对水体中柠檬醛消除的影响[J].水生态学杂志,35(1):65-69. |
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