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  龙二少 2019-04-11 11:07:29

  <p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（1）拖尾峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①柱温太低，适当提高柱温，但要保证所需要的分离度，更不能超过柱Z高温度。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②进样器衬套或柱吸附活性组分，更换衬套及减括玻璃毛。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③两个化合物共洗脱，提高灵敏度，减少进样量，降低柱温10-20℃，以使峰分开，更换柱子。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">④柱污染，去掉柱前端的减活玻璃毛或者更换柱子。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑤色谱柱选用不当，更换色谱柱，特别在气固色谱模式时，固定相的选用尤其重要。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑥系统死体积太大，柱后加尾吹，减少系统死体积。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑦金属填充柱吸附，改用玻璃填充柱。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑧色谱柱过载，PLOT柱更易过载减少进样量或稀释IO倍再进样。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（2）前伸峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①汽化室温度太低，提高汽化室温度以保证样品完全汽化。汽化室温度一般高于柱温50-100℃。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②柱温太低，提高柱温，保证样品在系统中不至于被冷凝。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③载气流速太低，检查载气稳压阀，检查柱出口流速，重调。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">④进样量过大，造成柱过载减少进样量，用小定量管或者增加固定相含量。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑤选用色谱柱不合适，更换色谱柱。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑥两种化合物共流出，提高灵敏度，减少进样量或降低柱温10-20℃以使峰分开；或更换色谱柱。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（3）圆头峰或平顶峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①进样量大，改用小定量管，减少进样量。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②记录器增益太低，调整放大量。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③超出检测器的线性动态范围，改用小定量管，减少进样量。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">④记录器、滑线电阻或机械传递系统有故障，检查并进行调整。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（4）鬼峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①柱头有污染物，老化柱子，然后空运行直至鬼峰消失。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②进样垫流失或降解，降低进样温度，更换高温进样垫。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③载气不纯，净化载气或者更换纯度高的载气。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">④汽化室污染，清洗汽化室。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑤固定相和载气中的污染物发生反应，更换固定相或载气。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">⑥进样口过热，降低进样口温度。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（5）分裂峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①检测器过载，减少进样量或者稀释样品浓度。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②柱温波动，检查温控系统及炉子封闭情况。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③进样技术不佳，形成二次进样，改善并提高进样技术。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">④密封垫泄漏，更换密封垫。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">（6）反峰</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">①记录器输入线接反，改正电源接线或信号倒向。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">②载气或燃烧气不纯，更换气瓶或净化器。</p><p style=" font-family:&#39;Microsoft YaHei&#39;;font-size:16px;line-height: 2em;position: relative;">③用TCD时使用N2作载气部分组分出反峰，改用H2或He作载气。</p><p><br/></p>

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