Subject: quantize the purity of a N-15 labeled amino acid

From: Chyh-chong Chuang <[email-masked]>
Date: Mon, 25 Mar 1996 11:02:22 +0800 (CST)

Dear Netters:

	We had a N-15 labeled amino acid, and we wish to know to purity 
of the N-15 labeled amino acid (relative to N-14 a.a.). We plan to use 
nmr and mass to do so. The problems are:

1. when use nmr, like we can use in 1H-nmr, there must be a internal 
standard N-15 peak for correlation. What kinds of the standard could be used?

2. If use mass, which kind of mass could be used to quantize a peak?
 
	Or any other alternate could do so? 

	Any comment will be great appreciated.

ccchuang

  ============================================
    Chyh-Chong Chuang
    Institude of Biological Chemistry, 
    Academia Sinica,Taipei, Taiwan
  --------------------------------------------
    Phone: 886-2-7858981 ext 7091 
    Fax: 886-2-7883473
    E-Mail: [email-masked]
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