|
| 相对湿度对大豆调和油氧化酸败的影响 |
| Effect of relative humidity on oxidation rancidity of soybean blend oil |
| |
| DOI： |
| 中文关键词: 大豆调和油 相对湿度 氧化酸败 过氧化值 酸价 速率常数 |
| 英文关键词:soybean blend oil relative humidity oxidation rancidity peroxide value acid value rate constant |
| 基金项目: |
|
| Hits: 1225 |
| Download times: 0 |
| 中文摘要: |
| 研究相对湿度（RH）对大豆调和油（BSO）氧化酸败的影响。采用自组装氧化装置，在温度50?℃、大气氧分压21 kPa、初始顶空率50%和室内光照强度（840 lx）的条件下，通过磷酸氢二钾溶液分别控制RH为50%、60%、70%、80%和90%，氧化BSO试样，测定不同氧化时间（t）时BSO的过氧化值（POV）和酸价（AV），由POV-t和AV-t回归曲线分析RH对BSO氧化酸败的影响。结果表明：BSO氧化酸败符合零级反应动力学特征，POV与AV随RH的增大和t的延长而升高；反应速率常数（k）随RH增大而增大。RH越大，氧化酸败速率越快，二者遵循二项式关系kPOV=-1E-05 RH2+0.002 4 RH-0.049 6和kAV=2E-07 RH2-2E-05 RH+0.000 5。因此，在生产、贮存、运输和消费过程中，应尽量降低BSO的贮存环境湿度，以减缓BSO的氧化酸败速率。 |
| 英文摘要: |
| The effect of relative humidity (RH) on oxidation rancidity of soybean blend oil (BSO) was studied. Controlling RH to 50%, 60%, 70%, 80% and 90% respectively with hydrogen dipotassium phosphate solution, BSO was oxidized in self-assembling oxidation device under the conditions of temperature 50?℃, atmospheric oxygen partial pressure (21 kPa), initial headspace rate 50% and light intensity 840 lx. The peroxide value (POV) and acid value (AV) of BSO were determined at different oxidation time (t), and the effect of RH on oxidation rancidity of BSO was analyzed by POV-t regression curve and AV-t regression curve. The results showed that oxidation rancidity of BSO was in accordance with kinetic characteristics of zero order reaction, POV and AV increased with the increase of RH and the prolonging of t, and the reaction rate constant (k) increased with the increase of RH. The higher the RH, the faster the oxidation rancidity rate, both conformed to binomial equation of kPOV=-1E-05 RH2+0.002 4 RH-0.049 6 and kAV=2E-07 RH2-2E-05 RH+0.000 5. So,the storage environment humidity would be reduced as far as possible to slow down the rate of oxidation rancidity of BSO in the process of production, storage, transportation and consumption. |
| 查看全文 View/Add Comment Download reader |
| Close |
|
|
|
