High Technology, Inc.
109 Production Road,
Walpole MA 02081 USA
Document Number
OM-E-FC-360-30
Revision Level
Rev. 3
Prepared by
J.S. Bolio
Approved by
S. Titov
Effective Date
8/15/2016
Operator’s Manual: HTI BioChem FC-360
HIGH TECHNOLOGY, INC. PROPRIETARY AND CONFIDENTIAL
Page 133 of 222
Photometer Precision
Photometric precision
is the measurement of the dispersion of absorbance measurements around the
mean and it is expressed as a variation coefficient. This measurement is always made in the same
cuvette.
Required materials:
Copper Sulfate Solution 30 g/l in Sulfuric Acid 0.45 N
Automatic Pipette
Procedure:
1. Dispense manually 300 µl of the solution in cuvette 2 or in any cuvette, indicating it on the
screen (Figure 12- 27)
2. Wait for 5 minutes to reach thermal stability of the solution in the cuvette
3. Select
Maintenance
Validations
Photometer Precision
Cuvette Number
OK
Filter
OK
4. The instrument makes 30 correlative readings of the solution at the selected wavelength,
reporting the obtained values in absorbance units AU, the arithmetic mean and the coefficient
of variation CV% for this data.
5. Perform the test in duplicate.
Figure 12-28
Figure 12-29
Acceptable photometric precision: CV% lower than
1.0%