EyeTech Sample Introduction


The Ankersmid Cell Modules are used to introduce sample for analysis with the EyeTech. Different cell types are presently available for various types of materials and preparations.
Each Cell Module has a built-in detector. Cells are easily installed and removed from the system with a bolt and a cable connector; this provides the ability to rapidly change cells when analyzing various materials. 
All Cell Modules are designed to optimize the conditions of analysis for a particular material. Based on the nature of the material, the user can choose to analyze the sample in any of the following forms: as dry powder, in a liquid medium, or as an aerosol. 




ACM-101 Magnetic Stirring Cell

The ACM-101 Magnetic Stirrer Cell Module is used for general analysis of liquid-borne particulates. Sample volumes from 1.5 ml to 3.5 ml are used. Only milligram quantities of a sample are required. Standard disposable plastic, or glass cuvettes are used, with a special magnetic stirrer situated at the bottom of the cuvette. Caution must be exercised when using solvents as media, to prevent damage to cuvettes or other parts of the measurement area.
Particle concentrations from 1,000 to 100 million particles per cc. may be measured; however, this Cell Module may not be appropriate for measurement of:
1.    Very dense or large particles which settle rapidly. 
2.    Magnetic particles which are attracted to the magnetic stirrer. 
3.    Very delicate particles, which may be ground up by the magnetic stirrer.

Tekstvak: ACM-101 and ACM-102

ACM-102 Mechanical Stirring Cell

The ACM-102 Mechanical Stirring Cell Module uses the same cuvette as the ACM-101, but incorporates a propeller inserted from the top of the cuvette for stirring the mixture. This Cell Module is recommended for measuring magnetic particles.




ACM-104 Liquid Flow Cell

The ACM-104 Liquid Flow Cell Module facilitates analysis of liquid borne particles which are propelled through the cell by an external pump. Large volumes of liquid can be pumped through the cell one way, or re-circulated (recommended when a large amount of material is necessary, to obtain a representative sample). 
The type of pump used is determined by the material to be analyzed, and the nature of the liquid medium used. 
The ACM-104 is used for in on-line applications, for monitoring the particulate content of continuous flow processes as well as for the measurement of heavy or dense particles, which can be maintained in uniform suspension by the action of a pump. The ACM-104 may not be appropriate for liquid volumes of less than 20ml, or for mixtures of particles with a high tendency to aggregate and clog the cell or tubing.
There are 2 version available of the ACM 104 with different path lengths. The cross section for the ACM-104 is 4 mm x 4 cm; the cross section for the ACM-104A is 10 mm x 10 cm. The LFC-101 Liquid Flow Controller can be used with ACM-104 to stir, re-circulate and Tekstvak: ACM-104 and ACM-104Lsonicate the sample.


ACM-104L Fiber Cell

The ACM-104L Fiber Flow Cell Module is dedicated to fiber analysis using the video channel. The fibrous sample is dispersed in a liquid and flows through the Fiber Cell from top to bottom using the LFC-101. The elongated cell section above the measurement zone, cause the fibers to orient in the laminar flow thus created. Hence, crossing and overlapping fibers are minimized improving both accuracy and analysis time of fiber analysis.




ACM-106 Aerosol Flow Cell

The ACM-106 Aerosol Flow Cell facilitates analysis of airborne solids or liquids found in a particular environment. It may be used in natural or industrial dusty environments to measure the particle size distribution and concentration of aerosols.
The ACM-106 Aerosol Flow Cell is used in combination with the Aerosol Flow Control Unit AG-10. Under suction provided by the AG-10 Aerosol Control Unit, particles flow downward through the cell. This air flow creates an “air sheath” within the flow cell, which prevents particles from adhering to the walls of the cuvette, blocking the laser beam.




ACM-108 Micro-Flow Cell

The ACM-108 Micro-Flow Cell propels liquids through a narrow flow cell for analysis. The liquid is propelled by an external pump through a narrow cell of 0.5, 1.0, 2.0mm light-path. Thus particles suspended in heavy or dense media (opaque or near-opaque liquids) can be analyzed. Recommended for opaque or near-opaque dispersions when only a small percentage of the laser light reaches the detector.
Signal amplification is optimized by a Calibration Knob. Instructions for calibration are provided through the software.





Tekstvak: ACM-108 Micro Flow Cell

ACM-110 Microscope Slide Cell

The ACM-110 Microscope Slide Cell accommodates particles to be analyzed from a standard microscope slide. The cell motor moves the slide vertically and horizontally, scanning the sample affixed to the slide.
The ACM-110 Allows a thin application of material as ink or emulations or as dry state of measurements such as dispersing inform powder (using PD-10 powder dispenser system) dispersed on a slide, to be analyzed via a motor that moves the microscope slide vertically and horizontally across the laser path. The mechanical motion is designed, so that no area is measured more than once.
Tekstvak: ACM-110 and PD-10



ACM-112 Dry Powder Free Fall Cell

The ACM-112 Free Fall Cell accommodates analysis of free flowing dry samples. A regulated flow of dry particles is passed through the cell module. Particle Size and Shape analysis with both laser and video channels is performed whilst the particles fall through the system.
The flow of the particles is regulated with the PF-101 Dry Powder Feeder.
Tekstvak: ACM-112 Dry Powder Free Fall Cell



AC-10 Aerosol flow Control Unit

The AC-10 Aerosol Flow Control Unit is dedicated to supply controlled pressured air and vacuum to allow optimal sample flow measurement with the ACM-106 Aerosol Flow Cell.
Under suction provided by a rotary pump in the Aerosol Flow Control Unit, particles flow downward through the cell. The outlet port is connected by plastic tubing to the air filter preventing the particles from reaching the reciprocator pump. A second port on the Flow Control Unit provides a small flow of air to the side inlet port of the ACM-106. This small air flow creates an “air sheath” within the flow cell, which prevents particles from adhering to the walls of the cuvette, and blocking the laser beam.
The user is to generate his aerosol and feed it to the inlet of the cell for analysis by both laser and video channel.

LFC-101 Liquid Flow Controller

The LFC-101 is a pumping unit providing recirculation and sonication of liquid samples upto 1000 ml. Both the flow rate and stirrer speed can be adjusted to keep the samples suspended. The sample is re-circulated through the ACM-104 flow cell using a peristaltic pump. Dispersion can be promoted by applying ultrasonics.

PD-10 Powder Disperser

The PD-10 is used to disperse a powder sample uniformly on a microscope slide to be analyzed with the ACM-110 Microscope Slide Cell. Alternatively, the slide can be analysed using an optical microscope.
A small quantity of powder is placed in a well at the top of the cylindrical reservoir of the Powder Disperser. Vacuum is applied, and with an abrupt trigger, the vacuum seal is momentarily broken. The sample is instantaneously sucked into the vacuum reservoir. The abrupt suction creates turbulent flow with high Reynolds numbers, and high shear forces, causing agglomerates to be broken, and the particles to be dispersed uniformly in the reservoir volume. After a short while equilibrium is achieved, as the reservoir has very low internal forces. Gravitational sedimentation then occurs simulating the process of isokinetic sampling and the particles form a uniform monolayer on the slide.

PF-101 Powder Feeder 

The PF-101, regulates the smooth flow of dry powder particles enabling Dynamic Shape Characterization measurement (DSC) and Particle Size Analysis (PSA) in the EyeTech and in used in combination with ACM-112 Free Fall Cell
The powder is directed into a thin stream that pours directly into the shape or laser scanning measuring area of EyeTech Shape Channel.  The flow is directed into the field of view of the video microscope and a video camera captures still pictures to be used in Shape Analysis.  In the EyeTech Laser Channel the flow is directed to the scanning volume and the computer analyzes the particle interaction signals.  With the PF-101 and the it is possible to attain rapid and accurate distribution results for a large number of powder particles. The practical working range for the PF-101 is from 50 um to 3,6 micron since smaller particle are likely to stay airborne.
Powders are measured directly without being dispersed in another medium, therefore they don’t undergo any alteration. Nor does a medium influence particle distribution. 
The PF-101 is simple to operate, and its precision design means that there is no waste scattering of particles, the sample material can be recuperated easily.  Its efficiency is especially advantageous regarding costly or toxic powders.  The EyeTech offers complete particle shape analysis on each particle.  Data can be presented individually on each particle (as statistics) or cumulatively (as distributions). The PF-101 Unit is a common unit and installation and operation are mentioned in its operation manual.








Ankersmid Lab          info@ankersmid-lab.nl,  (31)-0548-59 59 79