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Why is Coagulation Dose control important?Turbidity and NOM in the source water feeding a drinking water purification plant, particularly a surface water source, fluctuates over time. This continual change may require adjustment to the coagulant dose, pH or polymer addition to enable the flocculation process to work efficiently. Careful management of the coagulant dose with accurate and timely monitoring can impact the overall plant performance. Monitoring this based on zeta potential, a scientific measurement of the electrical potential charge between particles, provides reliable and relevant data. Particle charge neutralization is needed to enable a strong floc to form and allow the entire process to run smoothly. Here are the top 7 reasons to consider laboratory and/or on-line zeta potential systems for coagulation dose control.

Products:
Zetasizer range
Date:
April 26 2016
Language:
English

Products:
Empyrean range
Date:
August 6 2020
Language:
English

Selective laser sintering (SLS) is an additive manufacturing technique that uses a laser to selectively sinter powdered material (typically nylon or polyamide) to create a solid 3-dimensional structure. SLS has the potential to produce serial parts with high quality and high mechanical properties. Although the technique has been noted to have high potential for many years, there remain some challenges facing this approach.

Products:
OMNISEC system
Date:
July 28 2020
Language:
English

Products:
Zetium
Date:
July 24 2020
Language:
English

Fluorescence is commonly a problem in mineralogical phases like Hematite- Eskolaite, because these minerals contain the strongly fluorescing Cr and Fe ions. This data sheet shows how the 1Der detector excludes both Cr and Fe fluorescence. Empyrean’s unique optical configuration provides truly clean data leading to an excellent Rietveld refinement and resulting in an accurate crystal structure determination of this natural mineral. For X-ray diffraction (XRD) measurements on the Empyrean system, it is beneficial to be able to choose an X-ray tube to suit the requirements of a material. Standard Empyrean tubes offer a choice of Cr, Mn, Fe, Co, Cu, Mo and Ag, and other anode emission energies can be provided on request. Cu is the most commonly used anode and the Cu Kα emission peak is the most commonly used energy for diffraction experiments. In an X-ray diffraction experiment, the optics and the detector are together tuned to the narrow energy window required by the experiment. The 1Der strip detector can be automatically tuned to provide a narrow energy window around any chosen diffraction energy. This provides full flexibility across the whole range of Empyrean 1D applications. All elements fluoresce when irradiated with a certain X-ray energy. In a diffraction measurement, fluorescence from some elements can give rise to unwanted background intensity in a diffraction pattern. A high background reduces the possibility of identifying the low intensity peaks that often provide the final clues in a Rietveld crystal structure refinement. Figure 1 illustrates the elements that emit the greatest fluorescence interference in a diffraction measurement using a Cu X-ray tube. There are various strategies for excluding fluorescence interference and, in this datasheet, we show how the 1Der detector address the double challenge of fluorescence from both Cr and Fe elements.

Products:
Empyrean range
Date:
March 23 2015
Language:
English

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