II-6
Matec Applied Sciences
56 Hudson St., Northborough, MA 01532 Ph: (508) 393-0155 Fax: (508) 393-5476
www.matec.com
e-mail: [email protected]
b) Tabular data of relative and cumulative size distributions
c) Graphics of relative and cumulative size distributions
d) Hard copy or terminal display only
6. Sample Size:
One milliliter at 0.1-5 volume %, pre-filtered through a 5 micron or larger pore size filter. Filters are
available (See Section 6, Replaceable Parts and Consumables). The actual sample concentration to be
used is a function of the detectability of the sample. All samples must be aqueous based.
7. Operating Temperature:
20 to 40 degrees Celsius. Fractionation column temperatures can be set to a maximum of 99
°
C. A column
temperature of 35
°
C is recommended.
8. Sample Eluant
The CHDF GR-500 eluant consists of proprietary surface active agents in deionized water supplied by
Matec Applied Sciences in concentrated form. Three types of GR-500 eluant are available: 1X-GR500,
2X-GR500, and 2X-GR500-LA. The 2X-GR500 is the standard eluant used for regular submicron particle
size analysis. The 2X-GR500 normal conductivity must be in the range 22-27 µSiemens/cm. The GR500-
LA conductivity must be in the range 14-18 µSiemens/cm. The 1X-GR500 conductivity should be between
6 and 10 µSiemens/cm. Contamination of the eluant, especially by electrolytes, will result in lower than
expected particle sizes. The same eluant type must be used during calibration and regular operation of the
cartridge. Changing the eluant type changes the calibration curve.
To prepare a batch of eluant, combine 1 part GR-500 concentrate with 9 parts water deionized water. The
eluant may then be sonicated or filtered under vacuum for degassing purposes.
Lower ionic strength eluants produce stronger electrical double layer repulsion between the particles and
the capillary wall. Particles traveling closer to the center of the capillary travel faster down the capillary. A
lower ionic strength produces more efficient separations but a lower practical particle size range upper
limit. See section 2.5, Theory of Operation.
9. Capillary Hydrodynamic Fractionator:
Integral, removable, disposable cartridge (two are provided per unit, one as spare).
10. Power Requirements:
115 VAC to 120 VAC, 60 Hz, or
220 VAC to 240 VAC, 50 Hz, 2.5A, single phase
11. Physical Dimensions:
Comfortably fits on a standard lab benchtop
a) Size:
15" (37.5 cm) Wide x 28" (71.1 cm) Deep x 15" (37.5 cm) High
b) Weight:
65 lbs. (29.6 kg)
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