PSS FX 高浓度计数粒度分析仪
型号:PSS FX 高浓度计数粒度分析仪
PSS FX 高浓度计数粒度分析仪集原样进样检测、自动稀释等全自动检测功能于一身,为用户提供可方便、快捷、高效、可靠的粒径分析。FX系列Z小可以测试计数到150nm,浓度高达10million个/mL的样品。可以满足蛋白质聚集和高浓度slurry的测试要求,是PSSZ全能性的颗粒计数器系列产品。
The AccuSizer FX and FXnano are high concentration single particle optical size sensors (SPOS) that have the sensitivity to detect small differences in particle size distributions. They were designed to allow particle size monitoring to go from the R&D laboratory to the process line with a minimum to system reconfiguration.
The AccuSizer FX utilizes a focused beam technology that allows the sensor to focus on a specific area of the flow channel to count and size individual particles starting at 0.15 microns and at concentration levels exceeding 10 million particles per mL. These are concentration levels that are millions of times higher than traditional sensors. Although this type of approach has been tried by other techniques to monitor high concentration process streams it has been plagued by low resolution ad accuracy. The FX utilizes a patented electro-optical configuration that maintains the same levels of resolution and accuracy found in our traditional SPOS sensors.
The FXnano provides a summation signal that extends the lower size limit of the sensor below the standard FX sensor. Classically one of the limiting factors in the lower size limit of single particle optical sizers was the need to find diluents that are clean enough so that they do not add or make up most of the background counts of the sample being analyzed. The tremendous increase in particle levels with the FX sensors makes it easier to reach lower sizes where background count levels are no longer a concern. In the past a few thousand counts in the background would cause great concern but now with concentrations exceeding 10 million a few thousand background counts do not affect the overall distribution. This becomes critical when looking at nano particles below 0.5 microns.
PSS AccuSizer A2000 SIS/USP 全自动不溶性微粒检测仪
型号:PSS AccuSizer A2000 SIS CETAC 30万 - 50万AccuSizer A2000 SIS/USP 不溶性微粒检测仪
型号:AccuSizer A2000 SIS 30万 - 50万A7000 SIS 不溶性微粒检测仪
型号:AccuSizer7000 SIS 30万 - 60万美国PSS A7000 APS 全自动颗粒计数器
型号:PSS AccuSize-A7000-APS 90万 - 120万以蛋白质溶液为基础的治疗中,团聚可能产生有害的免疫原性。对于较大尺寸的聚集体可以进行测量,但在0.15到2微米范围内的较小聚集体很难量化。动态光散射(DLS)技术可以证明聚集体的存在,但不能提供关于聚集体绝对浓度的任何信息。单颗粒光学传感技术(SPOS)现在可以测量聚集蛋白的大小和浓度,并成为这一应用的首选技术。
为了研究“清剿火患”行动对安徽省火灾形势的抑制作用,采用 ARIMA 干预模型与火灾数据对比的方法对 2007—2012 年安徽省火灾统计数据进行了分析。2 种 ARIMA 干预模型都能检测到“清剿火患”行动对季节调整后火灾起数时间序列的抑制效果。根据干预模型,抑制效果在“清剿火患”行动开展后第 3 个月时出现,火灾立即减少约 300 起,随后抑制效果逐渐衰减。在“清剿火患”行动开展 14个月后,抑制效果几乎衰减为 0。通过对比“清剿火患”期间与 2009 - 10—2010 - 02、2010 - 10—2011 - 02 的火灾统计数据,发现“清剿火患”行动期间的火灾起数较前两年同期的火灾起数大幅度降低,平均降幅达 64% 。在此基础上又分析了不同火灾原因、火灾场所和火灾起数的降低情况。对比发现,“清剿火患”期间火灾死亡人数与死亡人数不低于 3 人的火灾起数均降低为 0。
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