10 / 258
J
audzems
:
J
ournal of
AOAC I
nternational
V
ol
.
99, N
o
.
4, 2016
1117
AgNO
3
volume (mL) consumed at titration end point for Blank
[
G
(
d
)];
f
is the dilution factor for preparation of reconstituted
powder, RTF, or concentrate {for samples requiring protein
precipitation [
F
(
a
–
c
)], an additional factor (e.g., for a 25 g
sample,
f
= 2) will be needed}; 35.45 is the chloride weight (μg)
corresponding to 1 mL 1 mol/L AgNO
3
; and 100 is the mass
conversion to milligrams/100 g.
Under the repeatable analysis condition, the absolute
difference between two independent test results should not
exceed 2% of the arithmetic mean.
References
(1)
Official Methods of Analysis
(2016) 20th Ed., AOAC
INTERNATIONAL, Rockville, MD, Method
2015.07
(2)
Official Methods of Analysis
(2016) 20th Ed., AOAC
INTERNATIONAL, Rockville, MD, Method
2015.08
(3)
Official Methods of Analysis
(2014) 19th Ed., AOAC
INTERNATIONAL, Rockville, MD, AOAC SMPR 2014.015
(4) GB/T 601-2002 (2002) Chemical reagent – Preparation of
standard volumetric solutions,
http://www.chinesestandard.net/ PDF-English-Translation/GBT601-2002.html10