国产一级一级理论片一区二区_久久综合图区亚洲综合图区_国产精品V欧美精品av日韩_日韩精品成人在线_亚洲欧美日韩动漫_国产精品一二三区在线观看公司_日韩成人无码一区二区三区

　　How does the Zeta-APS measure particle size distributions?
 

　　Zeta-APS如何測量粒度分布？
 

　　The Zeta-APS exactly measures acoustic attenuation (dB/cm) vs. frequency of sound (1 to 100 MHz) of colloidal dispersions. These measurements are commonly referred to as Acoustic Attenuation Spectroscopy. The Zeta-APS also simultaneously measures speed of sound vs. frequency, percent solids, pH, conductivity, and temperature.  The attenuation level, as well as, the shape of the acoustic attenuation curve shape is related to the particle size distribution (PSD). PSD’s are calculated from the acoustic attenuation data using software developed and patented by Lucent Technologies. This Lucent Technologies software is based on the Epstein and Carhart (later refined by Allegra and Hawley) theory of acoustic attenuation.
 

　　Zeta-APS準確測量了膠體分散體的聲衰減(dB/cm)與頻率(1-100MHz)的關(guān)系用的舒心。這些測量通常被稱為聲衰減譜技術發展。Zeta-APS可以同時測量聲速、頻率集成、固體百分比重要手段、pH值、電導(dǎo)率和溫度穩定性。衰減水平以及聲衰減曲線形狀與顆粒粒徑分布(PSD)有關(guān)像一棵樹。PSD是由Lucent Technologies開發(fā)并獲得的軟件。該軟件基于Epstein和Carhart(后來由Allegra和Hawley改進)的聲衰減理論。
 

　　How does the Zeta-APS measure Zeta Potential (ZP)?
 

　　Zeta-APS如何測量Zeta電位能運用？
 

　　The Zeta-APS uses an electroacoustic technique called Electrokinetic Sonic Amplitude (ESA, invented by Matec Applied Sciences) to measure Zeta potential of particles suspended in liquids. The Zeta-APS’ Zeta sensor applies short highfrequency (AC) pulses to the sample located within the electrode region of the Zeta sensor. These pulses last about 30 micro-seconds in the frequency range 0.5-3.5 MHz. The particles “jiggle” back and forth due to their surface electric charge which produces an output sound wave of the same frequency as the applied sound wave-provided there is a particle/solvent density difference of at least 2%. The sample can be mixed and/or pumped during the measurement without interfering with the ESA measurement.
 

　　Zeta-APS測量Zeta電位的方法被稱為電聲振幅(ESA)自動化方案。 Zeta-APS的Zeta電位探頭將高頻交流脈沖施加到位于傳感器電極區(qū)域內(nèi)的樣品中，這些脈沖在0.5-3.5 MHz的頻率范圍內(nèi)持續(xù)約30微秒越來越重要。由于粒子的表面電荷會產(chǎn)生與所施加聲波相同頻率的輸出聲波線上線下，因此粒子來回“擺動”，粒子周圍的介質(zhì)對其將有阻力的影響醒悟，這種阻力會以聲波的形式從粒子表面?zhèn)鞑コ鰜頂祿@示，電場?nèi)的粒子產(chǎn)生聲波的疊加，形成超聲波也逐步提升，其振幅就是電聲振幅(ESA)記得牢，通過ESA來計算Zeta電位。需要注意的是顆粒與介質(zhì)的密度差至少為2%重要的作用。 測量期間可以攪拌或泵送樣品更多可能性。