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© 2015 AOAC INTERNATIONAL
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Forty representative pesticides were selected based on guidance
from the AOAC Method-Centric Committee on Pesticide Residues
to conduct a multilaboratory validation study of the single-
laboratory validated (SLV) method using two representative brands
of tea. The representative pesticides selected for the multilaboratory
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LOQs for the 653 pesticides included in the SLV ranged from
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A. Principle
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DQG WKH H[WUDFWV DUH FOHDQHG XS ZLWK &OHDQHUW 737 $JHOD
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dried, dissolved in the recommended solution, and analyzed by
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B. Reagents
(a)
Solvents
.—Acetonitrile, toluene, and
n
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grade).
(b)
Acetonitrile–toluene.—
Y Y
(c)
Ultrapure water
.—Obtained from a Milli-RO plus system
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MA, USA).
(d)
Anhydrous sodium sulfate
²$QDO\WLFDOO\ SXUH %DNHG
at 650°C for 4 h and stored in a desiccator.
C. Materials
(a)
SPE cartridges
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PJ P/ $JHOD
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(b)
SPE tube adapter
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Shanghai, China), or equivalent.
(c)
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(d)
3HDU VKDSHG ÀDVN
² P/ =
($ 6LJPD $OGULFK
Shanghai Trading Co., Ltd), or equivalent.
See
Figure
2014.09
.
(e)
Reservoir
² P/ $ $JHOD RU HTXLYDOHQW
See
Figure
2014.09
.
(f)
Centrifuge tube
.—80 mL.
(g)
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