Probe Software Users Forum

Software => Probe for EPMA => Topic started by: Ben Buse on May 03, 2016, 07:37:59 AM

Title: Calculate Projected Detection Limits
Post by: Ben Buse on May 03, 2016, 07:37:59 AM

Hi,

I'm hoping someone can help. How do you get "Calculate Projected detection limits" to work I've checked it & "calc detection limits & sensitivity" but I can't see the projections in the log window. Any ideas what I doing wrong I'm sure I'm missing something - I remember we had this on a ancient version of Probe for Windows. I ask because I havn't time to enter the information into my excel spreadsheet to calculate it

Thanks

Ben

Title: Re: Calculate Projected Detection Limits
Post by: Probeman on May 03, 2016, 02:55:07 PM

Quote from: Ben Buse on May 03, 2016, 07:37:59 AM

I'm hoping someone can help. How do you get "Calculate Projected detection limits" to work I've checked it & "calc detection limits & sensitivity" but I can't see the projections in the log window. Any ideas what I doing wrong I'm sure I'm missing something - I remember we had this on a ancient version of Probe for Windows. I ask because I havn't time to enter the information into my excel spreadsheet to calculate it

Hi Ben,
Odd, it works for me (see below).

I think you have to have at least two or three data points?
john

Detection Limit (t-test) in Elemental Weight Percent (Average of Sample):

ELEM:       Th      Hf       U       P       Y
  60ci    .001    .001    .001    .000    .001
  80ci    .001    .001    .001    .000    .002
  90ci    .002    .002    .002    .000    .003
  95ci    .003    .002    .002    .001    .004
  99ci    .004    .003    .004    .001    .006

Predicted Detection Limits (99% CI) in Elemental Weight Percent (Average of Sample):

ELEM:       Th      Hf       U       P       Y
TIME:   640.00  640.00  640.00  640.00  640.00
BEAM:   100.54  100.54  100.54  100.54  100.54
PRED:     .008    .006    .004    .001    .005

Projected Detection Limits (99% CI) in Elemental Weight Percent (Average of Sample):

ELEM:       Th      Hf       U       P       Y
TIME:    10.00   10.00   10.00   10.00   10.00
PROJ:     .035    .028    .031    .007    .047
TIME:    20.00   20.00   20.00   20.00   20.00
PROJ:     .025    .020    .022    .005    .034
TIME:    40.00   40.00   40.00   40.00   40.00
PROJ:     .018    .014    .015    .003    .024
TIME:    80.00   80.00   80.00   80.00   80.00
PROJ:     .012    .010    .011    .002    .017
TIME:   160.00  160.00  160.00  160.00  160.00
PROJ:     .009    .007    .008    .002    .012
TIME:   320.00  320.00  320.00  320.00  320.00
PROJ:     .006    .005    .005    .001    .008
TIME:   640.00  640.00  640.00  640.00  640.00
PROJ:     .004    .003    .004    .001    .006
TIME:  1280.00 1280.00 1280.00 1280.00 1280.00
PROJ:     .003    .002    .003    .001    .004
TIME:  2560.00 2560.00 2560.00 2560.00 2560.00
PROJ:     .002    .002    .002    .000    .003
TIME:  5120.00 5120.00 5120.00 5120.00 5120.00
PROJ:     .002    .001    .001    .000    .002
TIME: 10240.0010240.0010240.0010240.0010240.00
PROJ:     .001    .001    .001    .000    .001
TIME: 20480.0020480.0020480.0020480.0020480.00
PROJ:     .001    .001    .001    .000    .001
TIME: 40960.0040960.0040960.0040960.0040960.00
PROJ:     .001    .000    .000    .000    .001

Analytical Sensitivity (t-test) in Elemental Weight Percent (Average of Sample):

ELEM:       Th      Hf       U       P       Y
  60ci    .000    .000    .000     ---     ---
  80ci    .000    .000    .000     ---     ---
  90ci    .000    .000    .000     ---     ---
  95ci    .000    .000    .000     ---     ---
  99ci    .000    .000    .000     ---     ---

Title: Re: Calculate Projected Detection Limits
Post by: Ben Buse on May 05, 2016, 05:41:01 AM

Thanks John yes I was trying it for a single point when I do it for 3 points it works  :)

Ben