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yxh-5566: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-12-24 12:39:57
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yxh-5566: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-12-24 12:39:57
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The 46 difference from your single-charged compound [M+H] normally should come from the formic acid adduct [M+H+HCOOH] since formic acid (or TFA) is added for positive mode in ESI. Only 22 differentiated from the [M+H] peak if a sodium was added, and 44 differentiated from the [M+H] peak if two sodium were added for single charged peak. For double charged peak, the m/z for it should be [M+Na+Na]/2 since two positive charge have been attached. the difference between isotope pattern should be 0.5 instead of 1 for single charged peak. |
3Â¥2012-12-21 23:56:09
organicsuper
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crity328: ½ð±Ò+1, ¸Ðл½»Á÷£¬»¶Ó³£À´~ 2012-12-21 21:21:01
yxh-5566: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-12-24 12:39:39
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crity328: ½ð±Ò+1, ¸Ðл½»Á÷£¬»¶Ó³£À´~ 2012-12-21 21:21:01
yxh-5566: ½ð±Ò+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-12-24 12:39:39
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2Â¥2012-12-21 19:06:35
zzjcust
Ìú¸Ëľ³æ (ÕýʽдÊÖ)
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4Â¥2012-12-22 07:17:16
yxh-5566
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5Â¥2012-12-24 12:26:55













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