Accuracy of various molecular weight determination methods.
| Standard Error of Estimate | |
| Mw by LALLS molecular weight above 50,000 | +/- 5 to 10 % |
| Mw by LALLS molecular weight below 50,000 | +/- 10 to 15 % |
| Mn by LALLS | +/ 20 to 30 % |
| Mw by MALLS molecular weight above 100,000 | +/- 3 to 10 % |
| Mw by MALLS molecular weight below 100,000 | +/- 10 to 15 % |
| Mn by MALLS | +/ 20 to 30 % |
| Mn by Membrane Osmometry MW above 50,000 | +/- 5 to 10 % |
| Mn by Vapor Pressure Osmometry MW 15,000 - 30,000 | +/- 10 to 15 % |
| Mn by Vapor Pressure Osmometry Mw belo15.000 | +/- 2 to 5% |
| Mw by GPC/SEC | +/- 3 to 10 % |
| Mn by GPC/SEC | +/- 10 to 15 % |
| Mz by GPC/SEC | +/- 10 to 15 % |
| Mp by GPC/SEC | +/- 3 to 10 % |
| Mw by GPC/DV Universal Calibration | +/- 5 to 10 % |
| Mn by GPC/DV Universal Calibration | +/- 10 to 15 % |
| Mz by GPC/DV Universal Calibration | +/- 10 to 15 % |
| Mp by GPC/DV Universal Calibration | +/- 5 to 10 % |
| Mn by End group analysis MW Below 10,000 | +/- 10 to 15 % |
| Mz by Ultra centrifuge Mw above 100,000 | +/- 10 to 15 % |
| Mv by Viscotek viscometer Y-501C | +/- 5 to 10 % |
| Intrinsic Viscosity by Viscosity Y-501C | +/- 5 to 10 % |