| 查看: 1182 | 回复: 11 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
交流
|
|||
请问虫子们：你们有没有做过油脂里的总酚含量测定？我们现在测遇到了一些问题，很无助，周围都没有人在做，不知道该怎么继续了？ |
回复此楼» 猜你喜欢
电子科技大学（深圳）高等研究院陈明豪课题组招收推免硕士研究生
已经有816人回复
-
金铜纳米合成
已经有0人回复
-
食品科学论文润色/翻译怎么收费?
已经有174人回复
-
求助1977版中国药典，非常感谢！！！
已经有1人回复
-
萝卜干防腐 馊酸味 微生物
已经有1人回复
-
求助bncc来源的金黄色葡萄球菌批号
已经有1人回复
-
国自然和省自然祈祷
已经有52人回复
-
祈福今年面上得中
已经有14人回复
-
国社科又开始会评了，不知道这次命运如何
已经有14人回复
-
基金评审意见有问题
已经有5人回复
5楼2012-04-25 15:49:12
2楼2012-04-25 15:21:02
4楼2012-04-25 15:42:23
|
是的，福林酚法，我们是测油的总酚含量，先用正己烷和甲醇提取出来，再测，按照文献上的操作，但是吸光度却很低，假若增加样品溶液的量又会产生沉淀。Briefly for the extraction of phenolic compounds, 10 g of oil was mixed with hexane (50 ml). This mixture was placed into a separation funnel and 20 ml of methanol: water (60:40, w:w) was added. The mixture was shaken for 2 min and the separated water phase was removed. This procedure was applied three times and all the water phases were combined and used for TP analysis. For TP analysis, the mixture of the sample solution (50 ll), distilled water (3 ml), 250 ll Folin–Ciocalteu’s reagent solution, and 7% Na2CO3 (750 ll) was vortexed and incubated for 8 min at room temperature. Then 950 ll of distilled water was added. The mixture was allowed to stand for 2 h at room temperature. The absorbance was measured at 765 nm against distilled water as blank |
6楼2012-04-25 17:38:58
20