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定性分析

定性分析

定性分析的主要任务是确定物质化合物)的组分,只有确定物质的组成后,才能选择适当的分析方法进行定量分析,如果只是为了检测某种离子元素是否存在,为分别分析;如果需要经过一系列反应去除其他干扰离子、元素或要求了解有哪些其他离子、元素存在,为系统分析。 定性分析包括色谱法Category:分析化学 ja:定性分析

物质

物质指:
- 佔有時間空间质量的东西。例如:電子質子中子金屬化合物空氣生物等等,以固體液體氣體相態呈現。
- 我们可以看到、嗅到、嚐到或接触到的东西;
- 与思想相对而言。
  - 按照辩证唯物主义理论,物质指独立于意识以外的,但可以被意识所反映、摹写的客观存在。

参看


- 反物質
- 唯物論
- 能量
- 时间
- 哲学
- 物理学
- 相態
- 粒子物理学 category:自然科学 ja:物質 ko:물질 ms:Jirim simple:Matter

定量分析

需要测定物质化合物)中各组分的相对含量的分析方法为定量分析,一般需要先进行定性分析,确定物质组分后,再选择合适的分析方法进行定量分析,因为对不同的组分元素离子,有不同的有效的分析方法,样品中是否含有干扰离子或元素,也是选择分析方法需要考虑的因素。由于定量分析可以确定组分的含量,所以有非常大的实际应用意义。 Category:分析化学 ja:定量分析

离子

离子是指原子由于自身或外界的作用而失去或得到一个或几个电子使其达到最外层电子数为8个或2个的稳定结构。这一过程称为电离。电离过程所需或放出的能量称为电离能。 在化学反应中,金属元素原子失去最外层电子,非金属原子得到电子,从而使参加反应的原子带上电荷。带电荷的原子叫做离子,带正电荷的原子叫做阳离子,带负电荷的原子叫做阴离子。阴、阳离子由于静电作用而形成不带电性的化合物Category:離子 Category:物理化學 ja:イオン ko:이온 ms:Ion simple:Ion

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