USP <611> System Suitability Reporting

Hello,

The ratio of individual peak area to IS area is used by the internal standard methods but it not stored for reporting. You would need to do a custom calculation in custom calculator or intelligent reporter to report that value. What software are you using CDS 2.x, Chemstation, or EZChrome?

Marty Adams

hello! I am using Chemstation. Thanks for any help!

What version of Chemstation? How many internal standards do you have? 

Marty Adams

Our Chemstation version is C.01.07 SR3 [465]. We have 1 internal standard.

Thank you for your help, Marty

Hello,

Okay first place a peak area field object at the top of the report and group it with itself. 

Select the group, open the properties, and repeat the group on injection id. Also in the group propertied set a filter for Compound_IsInternalStandard = true. Make sure the group show the IS area for each injection. 

Once you make sure the repeated field is correct you will need to store the value of the field in an indexed variable on Injection_ID.

You can also set the group to be hidden.

Finally you can use this variable in a later table to calculate the ratio and then get the RSD. 

Hello,

Okay first place a peak area field object at the top of the report and group it with itself. 

Select the group, open the properties, and repeat the group on injection id. Also in the group propertied set a filter for Compound_IsInternalStandard = true. Make sure the group show the IS area for each injection. 

Once you make sure the repeated field is correct you will need to store the value of the field in an indexed variable on Injection_ID.

You can also set the group to be hidden.

Finally you can use this variable in a later table to calculate the ratio and then get the RSD. 

Hello, thanks again for your help.

I think I have done everything correct up until the table. I have tried putting a table in but I'm not sure where to put the calculations or how to connect it to what you have shown me here. I appreciate any help you are willing to provide me.

Thanks

K

Just trying to see if I can bump this again.