Translate My Method (HPLC↔UHPLC)


ACD/Labs have teamed up with experienced chromatographers Patrik Petersson and Mel Euerby to provide an application for translating liquid chromatography methods. Simply fill in your method information below and translate HPLC methods to UHPLC and vice versa (applicable for any type of analytical gradient chromatography).

Compare Functionality of ACD/Labsĺ Method Translation Tools in ACD/Chrom Workbook and the Freeware Application

Functionality in Translation Tool Freeware ACD/Chrom Workbook
Scaling of gradient times and a geometric scaling of flow and injection volume
>9 time points
User input of exp dead and dwell volumes
Dwell volume compensation
Scaling of flow to hit optima in van Deemter
Pressure estimate and warning
Solvent consumption
Change in Rs
Re-equilibration estimate and warning
Estimate of dead volume based on particle and column dimensions
Estimate of dwell volume
Scaling of inj volume to compensate overload
Calculation of linear velocity
Calculation of L/dp
Instrumental and Column Parameters -
Original New Scaled New Selected
Flow (mL/min)
Flow scaled against column dimensions (mL/min). Typical for large molecules 0.20
Column i.d. (mm) 2.1
Particle diameter (um) 3.4
Column length (mm) 283
Injection volume (uL) 9.4 5.0
Dead volume (mL)
Dwell volume (mL)
Dwell time (min) 2.88 2.88
L/dp 83,333.3 83,333.3 44,117.6
In order to get accurate translations it is recommended to use experimentally determined dead and dwell volumes. A comprehensive description on potential pitfalls and how to avoid them can be found in "P. Petersson, M.R. Euerby and M.A. James, Translations between differing formats of liquid chromatography: Advantages, principles and possible pitfalls, LCGC, submitted March 2014".
Typical Dwell Volume Estimates
Alliance 1.40 mL
Acquity UPLC "classic" with 50 ÁL mixer 0.10 mL
Acquity UPLC "classic" with 385 ÁL mixer 0.44 mL
Acquity H-class with 100 ÁL mixer 0.38 mL
Acquity H-class with 250 ÁL mixer 0.53 mL
NB check also H-class extension loop size, i.e., add 50, 100, 250 or 1000 ÁL to the volumes above
Dionex RSLC 0.56 mL
Agilent 1100 1.22 mL
Agilent 1260 in low dwell volume config. 0.29 mL
Agilent 1290 binary in low dwell volume configuration 0.20 mL
Agilent 1290 quaternary in low dwell volume configuration 0.57 mL
For an accurate translation it is recommended to measure the dwell volume as described in the European pharmacopeia 7.0, 2.2.46. This is only necessary once for a certain instrument model and configuration.
Gradient Time Table -
Original Number column volumes New selected not compensated for dwell volume differences New selected compensated for dwell volume differences
Gradient steps tG1 (min) %B tG1 F1/VM1 tG2 (min) %B tG3 (min) %B
0 0.00 27.00
1 0.00 0.00 27.00
2 18.18 25.69 65.00 25.69 65.00
3 18.24 25.77 90.00 25.77 90.00
4 20.00 28.26 90.00 28.26 90.00
5 0.00 0.00 0.00 0.00
6 0.00 0.00 0.00 0.00
7 0.00 0.00 0.00 0.00
8 0.00 0.00 0.00 0.00
9 0.00 0.00 0.00 0.00
10 0.00 0.00 0.00 0.00
Start re-equilibration 27.00 20.06 28.34 27.00 28.34 27.00
Stop re-equilibration 27.00 26.06 36.82 27.00 36.82 27.00
Dwell volume warningNote: in order to compensate dwell or dead volume differences the injection of the sample must be made X min after the gradient starts. X = 0.41min
On Waters equipment use the Solvent Manager Misc Pre-Injector Volume command set to Y ÁL. Y = 83ÁL

Click to expandTips and hints for using Method Translator