The Agilent 7696 Sample Prep WorkBench can improve data quality
This document is an application note from Agilent Technologies describing the Agilent 7696 Sample Prep WorkBench. The instrument is designed to perform common sample preparation tasks such as dilutions, internal standard additions, derivatization, and liquid/liquid extractions for both gas chromatographic (GC) and liquid chromatographic (LC) analyses. The text highlights that the system uses two liquid dispensing modules, a vial heater, a mixer, and a barcode reader to achieve high accuracy and precision.
| Vial Heater Temperature | 80 °C |
|---|---|
| Solvent Usage Reduction | 600 pL |
| Calibration Curve R2 (Manual) | 0.934 |
| Calibration Curve R2 (Automated) | 0.997 |
| RRF RSD (Manual) | 16% |
| RRF RSD (Automated) | 4% |
It can perform dilutions/aliquoting, liquid addition, heating for derivatization or digestion, liquid/liquid extractions, and sample mixing.
Automating calibration curve standard preparation significantly reduces solvent usage compared to manual methods in volumetric flasks.
Yes, the automated method showed better reproducibility, reducing the combined R2 value reduction from 0.934 (manual) to 0.997 (automated).