UC知道纸层析QUESTION
来源：百度知道 编辑：UC知道 时间：2024/05/15 08:48:15
1。为什么只能用铅笔，而不是钢笔来画线？
2。is the color in green food color due to a single pure substance?explain? 绿色食物的颜色是单个的物质吗？
3.assume that you have been hired by a cosmetic company to analyze a competitor's nail polish for its pigment content.Explain why chromatography might be a suitable method?为什么纸层析可以用来分析指甲油的色彩成分？
2。is the color in green food color due to a single pure substance?explain? 绿色食物的颜色是单个的物质吗？
3.assume that you have been hired by a cosmetic company to analyze a competitor's nail polish for its pigment content.Explain why chromatography might be a suitable method?为什么纸层析可以用来分析指甲油的色彩成分？
1.因为钢笔使用墨水,在层析时墨水与色素,层析液混合使色素带颜色受到干扰.
2.不是.该颜色由多种色素组成,如叶绿素a,b,类胡萝卜素.
3.因为指甲油的各种色彩成分在层析液中溶解度不同,因此在纸上的扩散速率不同,将指甲油的各种色彩成分分离.