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Topic: what is the difference between peak area and peak hight ?  (Read 11255 times)

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Offline aeacfm

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what is the difference between peak area and peak hight ?
« on: May 07, 2010, 01:13:48 PM »
what is the difference between peak area and peak hight ?
is that can affect the analyzed element concentration if i measure by both ? if yes when i use peak  area and when i use peak hight

Offline Golden_4_Life

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Re: what is the difference between peak area and peak hight ?
« Reply #1 on: May 07, 2010, 02:24:27 PM »
Use either as long as you are consistent; there are stochastic models that characterize the difference between using 'area' vs. 'height' but essentially it is just "splitting hairs". If you have well-resolved peaks and a reference standard it don't really matter which you use.

Go Forth with Good luck.
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Offline JGK

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Re: what is the difference between peak area and peak hight ?
« Reply #2 on: May 07, 2010, 03:21:37 PM »
In the 20 odd years I've been doing chromatography, I've generally found that peak area gives a more reliable analysis with much less variability than peak height.
Experience is something you don't get until just after you need it.

Offline aeacfm

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Re: what is the difference between peak area and peak hight ?
« Reply #3 on: May 09, 2010, 08:06:53 AM »
ok gentlmen
but when i work with ICP peaks  the matter is difference
isnt it ?

Offline Ibin-Huan

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Re: what is the difference between peak area and peak hight ?
« Reply #4 on: May 18, 2010, 02:18:30 PM »
Peak area is more accurate than peak hight because peak area does not effect by broading I mean peak area does not change if parameters are changed.

Offline Golden_4_Life

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Re: what is the difference between peak area and peak hight ?
« Reply #5 on: May 19, 2010, 12:42:03 PM »
Peak area is more accurate than peak hight because peak area does not effect by broading I mean peak area does not change if parameters are changed.
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In our experience, if you modify the run parameters (e.g., change the oven temp, PSIG, etc.) then this causes a change in peak area for the identical sample.  So, that is why I said earlier you may use one or the other as long as you are consistent--though use of peak area is what I prefer and most often cited in the research literature.
Golden4Life

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