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Date: 14-Sept-04
LC Macro Contribution #19
Contribution 'Peak symmetry on screen and performance report'



Revision History
----------------

  1. A.01  Original Version for ChemStation  		14-Sept-04
  2. A.02  Updated Version for ChemStation B.03.01  	26-Jan-07
  3. A.03  Updated Use section with corrected syntax	05-July-11
 

Contribution Purpose
--------------------
    

This user contributed macros prints Peak symmetry on screen and 
the performance report, in addition a new performance report is created.


NOTES:	- This is a user contributed macro. It is not officially
          supported by Agilent Technologies.
	- It is not fully tested so some unknown errors can occure. 



Contribution Structure
----------------------

This macro is a set of files, containing...

  	  	- AO_Sym.mac
		- user.mac
	    	- readme.txt 



Prerequisites
-------------

- MS operating system as required by the revision of the 
  ChemStation in use 
- The ChemStation software, Rev. B.01.01 or higher



Installation
------------

        * Create a new directory AddOn in the C:\Chem32\CORE directory

	* Copy the following macro to ChemStation's
          executable directory as follows:

              C:\Chem32\CORE\AddOn\AO_Sym.mac
        

	* If a user.mac is alread present in the dirctory 
          C:\Chem32\CORE\USER.MAC please add the following line
              macro _Autopath$ + "AddOn\AO_Sym.mac"
        



Use
---


        If no user.mac file is present, please remember, that the macro
        need to loaded every time the ChemStation has been restarted.

	* Load the macro into the ChemStation using the command...

		macro _Autopath$ + "AddOn\AO_Sym.mac"
	
	 
        If the macro is called from the user.mac file, the macro is 
        present and will be executed.
	


Operation Overview
------------------

This macro creates a new menu task [Addon] + [Symmetry] + [Annotate].
This will calculate the symmetry for all integrated peaks 
1. prints the annotation on the screen 
2. and on the new performance report Style "Performance_New".
3. The macro is only used for the first signal.


The Symmetry calculated by this macro is different from the symmetry on all other 
reports in data analysis (see: Reference to your ChemStation Edition, p. 96).

This macro instead uses the formula:

Symmetry = W / (2 * D)

 with W = Peak width at 5% height
      D = Distance between peak fron and apex measured at 5% height

which is the same formula that is used for the USP tailing.