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Advanced Materials and its Application Feedstocks Property Analysis The chroma was obtained through a simple colorimetry method using spectrophotometer.Absorbency of oil sample was measured in the wavelength of 460nm(A), 550nm(B), 620nm(C),670nm(D), and the chroma value can be achieved by the formula as followed. Chroma value=1.29A + 69.7B +42.1C -56.4D The measurement of chroma value was repeated for five times. Results and Discussion Effect of peroxide content on reduction of chroma value of ZSO Some ZSO was weighed, mixed round for 1h in 70°C, and added into 1.5%, 2.5%, 5%, 10% of peroxide for reacting. The results was displayed in Figure 1. The Figure 1 showed the effect on decoloration of 2.5% peroxide was preferable in stated reaction temperature and reaction time. When the content of peroxide was lower than 2.5%, the reaction was not enough. While content of peroxide was higher than 2.5%, the impurity of oil sample was enhanced, and the chroma value was largened. |
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南京工大
木虫 (小有名气)
- 翻译EPI: 14
- 应助: 0 (幼儿园)
- 金币: 1971.3
- 散金: 102
- 红花: 6
- 帖子: 173
- 在线: 81.1小时
- 虫号: 1410020
- 注册: 2011-09-20
- 性别: GG
- 专业: 高分子组装与超分子结构
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Ci枣子: 金币+30, 翻译EPI+1, ★★★很有帮助 2013-05-07 13:14:29
Ci枣子: 金币+30, 翻译EPI+1, ★★★很有帮助 2013-05-07 13:14:29
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进料性质分析 进料的色度通过分光光度计用一种简单的比色法得到。分别在460 nm（A）、550 nm（B）、620 nm（C）、670 nm（D）四个波长值上对油样品的吸光率进行了测定，色度可以通过下面的公式求得： 色度=1.29A+69.7B+42.1C-56.4D 色度的测量重复五次。 结果和讨论 过氧化物含量对于花椒籽油色度值降低的影响 将一定量的花椒籽油称重，在70°C下混合循环1 h，之后分别加入1.5 %、2.5%、5 %、10 %的过氧化物进行反应，结果如图1所示。 图1表明，在规定的反应温度和反应时间条件下，过氧化物2.5%时的脱色效果较好。当过氧化物含量小于2.5%时，反应进行不充分。当过氧化物含量大于2.5%时，油品样品的杂质含量上升，色度值变大。 |
2楼2013-05-06 21:29:49
