HTEC-500/510
Problem: Broadened or split peaks were observed on chromatogram of PP-ODS2. Dopamine seemed OK, but if magnified the peak was broadened as well. The retenti...
Fri, 19 Jul, 2019 at 4:28 PM
: add equal volumes of 6 N HCl including 100 µM EDTA and urine then store at 4ºC. Add ammonia solution and titrate the pH to 4-7 before processing with the ...
Fri, 19 Jul, 2019 at 4:30 PM
Inject standards at the concentration(s) around where your sample concentrations are expected to be before, after, or between samples everyday. Standards ...
Fri, 4 Oct, 2019 at 2:22 PM
Please note there are many variables that can change the pressure such as tubing length, temperature, solvent composition, and precolumn. There is some bac...
Thu, 9 Jul, 2020 at 1:45 PM
The precolumn is most beneficial when placed before the separation column. This placement works most efficiently to remove contaminants from both the mobil...
Fri, 19 Jul, 2019 at 4:37 PM
When the tops of peaks appear flat, the data above the point has been lost. The Data Acquisition parameters needs to be set to a higher value. In Clarity/E...
Fri, 4 Oct, 2019 at 2:24 PM
Why is my baseline noisy? Many things can contribute to a noisy baseline ECD reference electrode needs to be new and not dry. If the reference electrod...
Fri, 19 Jul, 2019 at 4:39 PM
The instructions for adjusting the injector for leakage are in section 9 and fig. 9 of the attached manual. When reattaching the handle after the adjustment...
Thu, 26 Sep, 2019 at 2:57 PM
Possible causes are as follows: There is a leakage from the flow line. Columns are not held by column clips properly to ground static electrical cur...
Fri, 4 Oct, 2019 at 2:01 PM
If the Background Current (BGC) is too high, possible reasons include the following: If the separation column and/or precolumn are new, please wash the c...
Fri, 4 Oct, 2019 at 2:05 PM