STEP 技术™ - 从上到下的瞬间,整个样本,不只是一个单点!

STEP 技术™ - 空间和时间的消光图谱

我们仪器的核心在于尖端的 STEP技术(空间、时间消光图谱)。这项技术具有灵活性,能让您拥有前所未有的洞察力,能让您对乳液和悬浮液有深入的理解。
使用光源照射整个样品,并且使用多个传感器接收透过样品管后的光强度,得到消光图谱,我们就可以检测到样品成分和分离过程中样品的变化。

STEP-技术会给您带来快速、自由和灵活的测试手法。您可以选择对您的样品采用多点测试或采用单一点测试。您可以分析分散相粒子的沉淀和分层,以及真实的浓度范围。
此外,您还可以测量:稳定性、粒径分布、沉淀/乳液和澄清率,推测保质期,特定产品,观察凝聚结,测量絮凝率和絮体强度,观察厚度和沉淀/乳液层密度,研究胶体的结晶,等等。

Scheme

STEP-Technology™ general scheme and for LUMiReader PSA (below) with patented tilt technology for measuring either in real-time (gravity) or with a reduced measurement time (depends on tilting degree).

Read about STEP Technology® in detail

STEP-Technology permits to obtain Space- and Time-resolved Extinction Profiles over the entire sample length of up to 12 different samples simultaneously. Parallel light (I0) illuminates the entire sample cell and the transmitted light I is detected by thousands of sensors arranged linearly across your whole sample from top to bottom with a microscale resolution. Transmission is converted into extinction by lg I/I0 and particle concentration may be calculated. STEP-Technology gives also high flexibility to use different cells to match specific sample properties.

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By means of the comprehensive software SEPView the light intensity can be adjusted to the corresponding sample turbidity. Transmission profils are recorded as fast as each second or with time intervalls up to hours, displayed as a sequence on the screen. Transmission date are automatically stored in a special designed database, together with all instrument settings and actual calibration data.

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The speed of the centrifuge can be set at a constant value or programmed to change during the measurement in the range from 200 rpm to 4000 rpm. These rpm-values correspond to relative centrifugal forces (RCF) at the bottom of the cell of 5 to 2300 (RCF = centrifugal acceleration/earth gravity). Built-in temperature control covers all present and future applications.

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Evaluation Features: The evolution of the transmission profiles contains the complete information on the kinetics of any concentration changes due to creaming, sedimentation, flocculation, coalescence or phase separation. Based on these space- and time-resolved extinction profiles demixing phenomena are quantified regarding clarification velocity, sedimentation and flotation velocity of particles, residual turbidity, separated phase volume (liquid or solid), sediment consolidation or dewaterability.

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Furthermore, comprehensive infomation is obtained with respect to the multimodality or polydispersity of dispersed particles.



选择在您手中

无论是研发、质量控制、产品优化,LUMiSeries都让您遥遥领先竞争对手。LUMiseries组成如下:LUMiReader PSA, LUMiReader X-Ray, LUMiSizer, LUMiFuge and LUMiFrac.