Fla. Admin. Code Ann. R. 20-65.004 - Procedure
(1) The colorimeter or spectrophotometer is
to be kept with power connected and maintained on standby or in accordance with
manufacturer's instructions. Turn the instrument to "on" position for ten
minutes before making measurements, or follow directions of manufacturer. All
light sources shall conform to CIE (1931) illuminant C. All OJ4 color tube
calibration values are to be obtained from the Winter Haven, FL laboratory of
the Processed Products Branch, Fruit and Vegetable Division, Agricultural
Marketing Service, United States Department of Agriculture.
(2) For the HunterLab Model D45 Citrus
Colorimeter, standardize Citrus Red (CR) and Citrus Yellow (CY) with OJ4 color
tube indexed for the instrument. Insert sample of juice at indexed position for
the sample tube and read CR and CY and record.
(3) For the HunterLab Model D45D2 Citrus
Colorimeter, standardize Y, CR and CY with OJ4 color tube indexed for the
instrument. Insert sample of juice at indexed position for the sample tube and
read CR, CY and Color Number (CN) and record.
(4) For the Macbeth Color-Eye
Spectrophotometer Model 1500 or Model 2020+ with Optiview Software Package,
equipped with the 19 mm aperture tube adapter and operated with small area view
(SAV) setting with UV and gloss included (CRIIS), standardize X, Y, and Z with
white tile with SAV plate in place. Replace SAV plate with tube adapter and
insert sample of juice at indexed position for the sample tube and read color
number values as shown on instrument, then record.
(5) For the Macbeth Color-Eye
Spectrophotometer Model 3000 or 3100 with Optiview Software Package, equipped
with the 19 mm aperture tube adapter and operated with small area view (SAV)
setting with UV and gloss excluded (DREOS), standardize X, Y, and Z with white
tile with SAV plate in place. Replace SAV plate with tube adapter and insert
sample of juice at indexed position for the sample tube and read color number
values as shown on instrument, then record.
(6) For the GretagMacbeth Color i5
Spectrophotometer with Color IQ Basic Software and 19mm Orange Juice Test Tube
Holder. UV and Gloss exclusion is processed by software. Calibration is
prompted by software. When completed replace Orange Juice Holder. Push F6 and
Color Number is reported. For confirmation, lights illuminated on front of
Color i5 should be: LAV, Reflection, D65, Excluded and Calibrated. Calibration
required every 24 hours.
(7) To
determine color number or equivalent color score, use the figures in
subsections (2)-(5) to calculate the color number or equivalent color score as
set forth in Rule 20-65.005,
F.A.C.
Notes
Rulemaking Authority 601.10(7), 601.11, 601.24 FS. Law Implemented 601.10(7), 601.11, 601.24 FS.
Formerly 105-1.19(1)(r), (2)(b), Amended 1-1-75, Formerly 20-65.04, Amended 1-30-86, 1-12-92, 6-21-93, 1-17-95, 10-26-97, 8-22-06.
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