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In the Introduction they state The high resolution and sensitive system have the ability to obtain the result of elemental composition analyses .  This is true only if there are enough ions in the isotopic envelope that allow to extract valuable information about the isotopic composition of each individual ion (ion intensities must reflect the correct isotopic distribution for any given ion within the isotopic envelope).
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°®ÓëÓêÏÂ(½ð±Ò+1): 2012-01-28 10:39:23
The collection of peaks (signals in a mass spectrum) for a
peptide containing different numbers of heavy atoms is referred to as an isotope envelope.
For a small peptide, the first (lightest) peak in the envelope is the most intense peak. This is
not the case for larger molecules in which the incorporation of naturally occurring heavy
isotopes becomes statistically more and more likely and hence the isotope envelope shifts to
higher and higher masses.
9Â¥2012-01-18 12:57:49
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hjj8151

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°®ÓëÓêÏÂ(½ð±Ò+1): 2012-01-17 19:58:18
remayking(½ð±Ò+2): ¡ïÓаïÖú 2012-01-18 14:55:00
sltmac(½ð±Ò+5, ·­ÒëEPI+1): 2012-02-09 15:18:09
sltmac(·­ÒëEPI-1): 2012-02-09 15:18:27
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2Â¥2012-01-17 10:16:46
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2Â¥: Originally posted by hjj8151 at 2012-01-17 10:16:46:
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лл»Ø´ð£¬"isotopic envelope"ÎÒÒ²²»¶®Ê²Ã´Òâ˼£¬Ö÷Òª¾ÍÊÇÕâ´Ê²»¶®£¬Ôì³ÉÕû¾äµÄ²»Àí½â¡£
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3Â¥2012-01-17 10:19:57
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hjj8151

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°®ÓëÓêÏÂ(½ð±Ò+1): 2012-01-17 20:02:24
"isotopic envelope"û±ØÒªÀí½â°¡£¬Ò²Ã»±ØÒªÇ¿·­Ò룬ºÃ¶àרҵ´Ê»ã²»ÓÃÇ¿·­ÒëµÄ¡£±ÈÈç˵"toluene"£¬ÄãÈô²»ÖªµÀËüÊÇ¡°¼×±½¡±µÄÒâ˼ÓÐʱҲû¹ØÏµ°¡£¬Ö»ÒªÖªµÀËüÊÇÒ»ÖÖ»¯Ñ§Ò©Æ·¾ÍÐÐÁË¡£ÕâÀïÄãÖ»ÐèÖªµÀ¡°isotopic envelope¡±ÊÇ´æ·ÅºÃ¶àÀë×ӵĵط½¾ÍÐÐÁË£¬ÎÒ¾õµÃ¸ú¡°Àë×ÓÚ塱²î²»¶à£¬¿´Ñù×ÓСµã£¬^_^¡£ÈôÏë³¹µ×Ū¶®¾ÍµÃÉîÈëѧϰÕâ·½ÃæµÄרҵ֪ʶ£¨ÓÈÆäÊÇÍâÎÄÎÄÏ׺Í׍ָ£©ÁË£¬ÄǾͿ´ÄãͶÈëÖµ²»ÖµµÃÁË¡£²»¿ÉÄÜͨ¹ýһƪÎÄÕ¾Ͷ®µÄ¡£
4Â¥2012-01-17 10:28:17
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