Hi Tomas

I think that we should use these names to follow the IUPAC recommendations:
- Total ion current (or TIC) [= what you refer to as TICsum]
- Base peak chromatogram [= what you refer to as TICmax]

I don't like TICsum and TICmax since these are not standard terms and therefore 
will confuse the users.

As for the XIC, then I agree that we have to be able to account for the plot 
type (base peak intensity or total ion current). I suggest that we use the 
following terminology to make it as clear as possible:
XIC - Total ion current
XIC - Base peak intensity

But if you would rather that we use short names like XICsum and XICmax [or XIC 
(Sum) and XIC (Max) ] then let's go for that but then I suggest that we add 
(Sum) and (Max) to the plot type names in the parameters. I cannot find a 
standard definition of how to distinguish the two XIC plots and I actually 
think that many people don't realise that an XIC plot can be generated in two 
different ways.

Cheers,

Thomas

-----Original Message-----
From: Tomas Pluskal [mailto:plus...@oist.jp] 
Sent: 26. februar 2015 06:19
To: Developer discussion
Subject: Re: [Mzmine-devel] Questions about the XIC plots

Hi Thomas,

> Sorry for my late response. I do think that the plot should be labelled "XIC" 
> and not "Base peak plot". The way I read the IUPAC Recommendations 
> (http://www.iupac.org/home/projects/project-db/project-details.html?tx_wfqbe_pi1%5bproject_nr%5d=2003-056-2-500)
>  (PDF can be found here: 
> http://pac.iupac.org/publications/pac/pdf/2013/pdf/8507x1515.pdf) a base peak 
> plot shows the intensity of the maximum intense peak in each spectrum over 
> the retention time and therefore shows data from many m/z measurements 
> whereas an XIC plot shows only the intensity of a narrow range of m/z values 
> over the retention time.

Ok, I agree that according to the IUPAC recommendations we should not call it 
"Base peak plot", because they only define base peak relative to the whole 
spectrum.

However, we still should somehow distinguish the two types of plot that we 
have: sum and max.
Remember, each chromatogram plots some m/z range (TIC plots show the whole m/z 
range, while XIC plots show a selected narrow sub-range).
Within this given range, we can plot either sum of all intensities (that's what 
MZmine now calls TIC) or a maximum intensity (that's what MZmine now calls Base 
peak).
We could distinguish these by making 4 types:
TICsum
TICmax
XICsum
XICmax

Or, any other idea?

Tomas


===============================================
Tomas Pluskal
G0 Cell Unit, Okinawa Institute of Science and Technology Graduate University
1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
WWW: https://groups.oist.jp/g0
TEL: +81-98-966-8684
Fax: +81-98-966-2890


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