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全网最完整、最实用的HPLC基础知识(PPT/257页)

  • 2026-05-30 11:47:52
全网最完整、最实用的HPLC基础知识(PPT/257页)
全网最完整、最实用的HPLC基础知识(PPT/257页)
文章中仅展示前20页,需要完整版,布谷鸟公众号对话框回复:av
应用:
高效液相色谱法(High Performance Liquid Chromatography \ HPLC)又称高压液相色谱”、“高速液相色谱”、“高分离度液相色谱”、“近代柱色谱”等。高效液相色谱是色谱法的一个重要分支,以液体为流动相,采用高压输液系统,将具有不同极性的单一溶剂或不同比例的混合溶剂、缓冲液等流动相泵入装有固定相的色谱柱,在柱内各成分被分离后,进入检测器进行检测,从而实现对试样的分析。该方法已成为化学、医学、工业、农学、商检法检等学科领域中重要的分离分析技术应用。

高效液相色谱法有“四高一广”的特点:

①高压:流动相为液体,流经色谱柱时,受到的阻力较大,为了能迅速通过色谱柱,必须对载液加高压。

②高速:分析速度快、载液流速快,较经典液体色谱法速度快得多,通常分析一个样品在15~30分钟,有些样品甚至在5分钟内即可完成,一般小于1小时。

③高效:分离效能高。可选择固定相和流动相以达到最佳分离效果,比工业精馏塔和气相色谱的分离效能高出许多倍。

④高灵敏度:紫外检测器可达0.01ng,进样量在μL数量级。

⑤应用范围广:百分之七十以上的有机化合物可用高效液相色谱分析,特别是高沸点、大分子、强极性、热稳定性差化合物的分离分析,显示出优势。

⑥柱子可反复使用:用一根柱子可分离不同化合物

⑦样品量少、容易回收:样品经过色谱柱后不被破坏,可以收集单一组分或做制备。

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  1. CONNECT:[ UseTime:0.000825s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000621s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000618s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000713s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000599s ]
  6. SELECT * FROM `set` [ RunTime:0.000662s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000602s ]
  8. SELECT * FROM `article` WHERE `id` = 519477 LIMIT 1 [ RunTime:0.012535s ]
  9. UPDATE `article` SET `lasttime` = 1780480895 WHERE `id` = 519477 [ RunTime:0.036991s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.012023s ]
  11. SELECT * FROM `article` WHERE `id` < 519477 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000671s ]
  12. SELECT * FROM `article` WHERE `id` > 519477 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000649s ]
  13. SELECT * FROM `article` WHERE `id` < 519477 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.013772s ]
  14. SELECT * FROM `article` WHERE `id` < 519477 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.027194s ]
  15. SELECT * FROM `article` WHERE `id` < 519477 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.010906s ]
0.278149s