Influence factors of particle size determination of Y zeolite powder by laser grainsize analyzer
Marvin laser particle size analyzer with wet dispersion unit was used to test the particle size of Y zeolite powder.The effects of sample addition mode,ultrasonic time,refractive index,absorption rate,rotational speed and shading degree on the par-ticle size were investigated.The results showed that the optimal testing conditions for the particle size of Y zeolite powder were:pre-dispersion sampling method,ultrasonic power of 40 W,ultrasonic treat-ment time of 60 s,injector speed of 2 500 r/min,sample opacity of 8％-15％,refractive index of 1.46,and absorption index of 0.001.After 5 repeated determinations,the maximum relative standard de-viation of D10,D50,andD90(when the cumulative par-ticle size distribution percentage of the sample was 10％,50％,90％,the corresponding particle size in turn)was 6.275％,and the maximum weighted residual value was 0.429.
laser grainsize analyzerY zeoliteparticle size distributionparticle sizeweighted residualrelative standard deviation
万方数据
维普
