Reasons for using direct adaptive Di-Ad HPLC column connectors - Tips & Suggestions
February 28, 2022
/
/
/
/
/
/
/
/
/
/

How to reduce peak broadening due to poor column connections

The spring-loaded "Direct Adaptive" Di-Ad™ HPLC column connectors were designed for speed and convenience when changing between different column brands on your instrument. 

In the example below, we demonstrate how this error-free process using DiAd fittings can also reduce peak broadening from common poor connections.


Trace Fitting Used Height (mAU) Plates (N)
Black PEEK 31.33 6306
Red Poorly Inserted PEEK 30.36 6023
Blue Di-Ad™ 35.37      7160
 

Method Conditions:
Direct Adaptive HPLC column connector: Double end fitting

Catalog No.: 49910-10-DD
Dimensions: 0.010" ID x 1/16th" OD, 100mm long

Column: Cogent Bidentate C8™, 4μm, 100Å.
Catalog No.: 40008-10P
Dimensions: 4.6mm x 100mm
Mobile Phase: 40% acetonitrile / 60% DI water 0.1 % formic acid
Injection vol.: 1µL
Flow rate: 1.0mL / minute
Detection: UV 254nm
Sample Preparation: 0.1mg / mL phenol in mobile phase.

Notes: Column efficiency: theoretical plates (N) 1/2 Height   N = 5.54((tR/W)2)
tR = Retention time of peak
W = Width of peak measured at 1/2 height


Related Articles

  1. Can I use a PEEK finger tight fitting on stainless steel tubing - Can I use a SS fitting on PEEK tubing in HPLC - FAQ
  2. Do all PEEK HPLC fittings fit all receiving ports - FAQ
  3. How can a finger tight fitting be producing band broadening in HPLC - FAQ

© Copyright 2025. MICROSOLV. All Rights Reserved. Website & Hosting by BlueTone Media