I have attempted to measure the size distribution of SWCNT ink NMP using the quartz cells. During my measurements, the stated CNT ink concentration is approximately 5.4 µg/ml concentration and my measurements are at 100 times dilutions and I have tried no dilutions and higher dilution factors aswall. Unfortunately, my results have not been reproducible and we suspect that the choice of cuvette and instrument specifications may play a crucial role in achieving consistent and accurate results. I can't use conventional plastic cuvettes because of the NMP. Any suggestions for cuvette specification?

Thank you very much!