Hello, I have prepared a membrane but the theoretical pore size is around 1.8nm. Does anyone knows a dye with molecular size larger than 1.8nm? I want to do the separation experiments on this membrane. Thanks
Hi,
Reactive green 19 and direct red 80 are around 1.7nm in diameter. If you use UVVis spectroscopy for solution analysis, you can also use vitamin B12. They all have similar hydrodynamic size. I believe, PEG 2000Da is also around that value.
Good luck!
Thanks Tiara Puspasari,
In fact, i intend to do any separation with pore size of around 2nm. Even if it's not a dye, that's ok. I only need to follow it by UV so the molecule should be UV reactive. Thanks
To go for UV analysis, you can also use cytochrome c (around 3nm) or myoglobin (3.5nm). Dyes are usually between 1- 2nm.
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