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5Â¥2012-11-05 11:40:19
newday430
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2Â¥2012-11-02 17:05:10
newday430
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3Â¥2012-11-02 17:06:56
catwithdog
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marktiger: ½ð±Ò+1, ¸Ðл²ÎÓ룬»¶Ó³£À´¡£ 2012-11-05 16:31:46
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ÒºÏàÍÏβÒò×ÓÏ൱ÑÏÖØ 1. Check you concentration. See if you overload your sample. 2. Check if other impurity peaks hide in your main peak. 3. Change other columns to see any help. 4. Search literature and understand your compound's chemistry and find a better Mobile phase. ÄǸö½øÑùÕëÐÂÂòµÄÓÃÁËÒ»´Î¿ÚÉϾÍÓкöàºÚÉ«Ñõ»¯Îï ÔõÑùÇåÏ´Óëά»¤ 1.Check your MP. What is your pH for MP. It should be higher than 2. Don't use HCl to adjust pH. 2. Post wash your needle for every injection. After run the whole sequence, set up a wash method with a long time water wash. |
4Â¥2012-11-03 00:42:52














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