2 Responses to “Question about Flame Photometry”

1. admin says:

   April 19 at 12:28 pm

   In <1994Apr15.20383…@hkpv17.hkp.hk> cci…@hkpv17.hkp.hk writes:
   >Dear all,
   >I want to ask a question:
   >Should the Calibration graph for the Flame Photometry (direct-Intensity method)
   >be plotted as a straight line or a curve?
   >Thanks for you all the kind help!!

   It depends on the exakt conditions, including things like instrument type,
   flame conditions, element, concentration range etc.

   But as a general hint from my own experience:
   If your calibration standards differ not more than one to ten and you are
   measuring in the optimal concentration range for the element/instrument,
   you should expect a linear calibration. If not, everything is possible.

   –

   —————————- <- cut here -> —————————-
   rolf elak  r…@nite.toppoint.de | Disclaimer:  Neither my employers
   D-24114 kiel                    | opinions nor my own. Just a road-
   N-8270 drag                     | kill on the informational highway…
2. admin says:

   April 19 at 12:28 pm

   > Should the Calibration graph for the Flame Photometry (direct-Intensity
   > method) be plotted as a straight line or a curve?

   > Thanks for you all the kind help!!

   For reasons of accuracy you should always choose the linear range for  
   calibration. If the calibration plot shows a curve, your calibration range  
   is probably too wide. Split up this range into smaller ones. Each single  
   one will probably show a linear plot. Or use a smaller concentration as  
   your highest point of calibration. As far as I know there are only very  
   few elements that don’t show a linear correlation between concentration  
   and signal at all, even at very low concentrations.

   So long,
           Rainer
   —
   Rainer Hofmann                             rhofm…@goffy.freinet.de
   Voice: ++49 761 4764055                    MausNet: Rainer Hofmann @FR
   Fax:   ++49 761 4764083
   ## CrossPoint v3.0 R ##