What are the recommended TRPS settings for zeta potential measurements compared with conventional size and concentration measurements?

A summary of recommended setting for various TRPS measurements is shown below.

Table: Typical settings for various TRPS measurements.

Settings

TRPS measurements

Size

Concentration

ζ-potential

Applied voltage

≤ 1.6 V

≤ 1.6 V

 0  ̶  10 V

Applied pressure

≤ 2 kPa

≤ 2 kPa

≤ 0.2 kPa

Sample size range

50 nm   ̶  100 μm

50 nm   ̶  100 μm

50 nm   ̶  2 μm

Sample concentration

Size dependent

Size dependent

Size dependent