Curve coefficient didn't correspond to the average.

Hello,

Which injection did you use to show in the report for the calibration curve? Look at your calibration curve in data analysis and see what the A value is for that curve. Also note the way you are calibrating every sample or sample pair has a different calibration. Look at the example below where I have discreet brackets for the standards but are processing in the standard manner. You will note the A coff changes after each standard set. In older versions, before CDS 2.5 the coff would have changed after each standard injection not each bracket. In this case bracket is defined as cal std injections with no other sample types between them. If you want all your standard injections taken into account for all other injection types, you should use the overall bracket. 

Marty 

Hi Martin, another question regarding the overall bracketing mode. It seems that the "clear calibration" option is not available in this particular mode. 

I assume the clear calibration is doing automatically? 

in the online help, I can read this: 

Have you ever observed that? 

I will check with my another injection days but I contact you just to make sure it's not a 2.6 version bug. 

Hello,

That is the correct behavior, the run type is no longer an option with overall bracketing. When using the overall bracket any previous method calibration is cleared automatically within the bracket. Please note as I stated previously any injections that need the calibration should be inside the bracket (i.e. be somewhere in-between the first and last cal std injection in the result set). If you have blanks, system suitability, cleanup runs, etc. that do not need the calibration applied they can be outside the bracket. 

Marty

Thank you Martin for this complete and clear answer. I really appreciate. 

I try to add my sample name into the footer, but I have no results on the PDF when I tried. Can we add Sample_name field in the footer? 

I try to add my sample name into the footer, but I have no results on the PDF when I tried. Can we add Sample_name field in the footer? 

Hello,

A text box in the header and footer will not show the sample name value but a field will. The first object is a field, and it shows the label and sample name value in all 3 locations. The second object is a text box, and it only shows the sample name in the report body. 

Marty Adams

Hi Martin, I am not sure I understand. Because I saw that if I put only text it will show in the footer. But can you confirm with that I can't add the field  "sample_name" in the footer? I can only see the field in the report body. Is it right? 

Hello,

At least in CDS 2.7 the sample name field works in the footer. What does not work is a text box with the expression =sample_name in the footer. A field object has a label and value where the text box only has a value. 

Marty

Text Box does not work in footer for sample_name 

Field object does work in footer for sample_name

Thank you Martin. It works well. 

Hi Martin, We have updated our openlab CDS to 2.7 version so we can have the multiplier variable used in the process method. 

This multiplier is filled to have all my 64 compounds. But in my sequence summary injection table, some injections has no multiplier. Do you know why? 

Hello,

I will assume you are trying to show the compound multiplier in that column. That table is setup to display one line per injection, but you have different multipliers for each compound so it cannot really display the value properly. What it is likely doing is finding the first peak in each injection and displaying the multiplier for that peak. Injections where you have no peaks, or the first peak is an unknown will not have a value for the multiplier. That is one reason I said earlier when you have the same multiplier for all your compounds it makes more sense to use a sample multiplier. Try using =Max(compound_multiplier) for the expression in the table column. It still will not work for injections that have no found peaks. You would typically display the compound multipliers in a table where you are displaying the compound results so you can see the value for each compound.  

Marty