Page 276 - Natural Antioxidants, Applications in Foods of Animal Origin

Methods and Their Applications for Measuring 255
VetBooks.ir 6.5 ATTACHMENTS

Attachment 1. Statistical basis for the inferences made for data in Figure
6.40. Making inferences about peroxide values collected to describe the
effectiveness in managing oxidation requires samples be randomly selected
and the data are normally distributed. Figures 6.40 and 6.41 show the data
collected are normally distributed.

Peroxide Values of a Meat Ingredient
12.0-r------------------------------,
~
10.5 - ;\
9.0 ::\. !) c£\ /\ I \
\:j
7.5 ~ ""' p

10 13 16 19 22 25 28 31
ObseiVation
!-===========================! UCL~3.235

10 13 16 19 22 25 28 31
Observation
FIGURE 6.40 PV data taken from samples collected at different times during production
show acceptable variation. This data can be used to determine if the peroxide values fit the
normal distributed curve.

Probabitity Plot of Peroxide Values
Normal - 95% CI
,
,
!
,
,
99~~~~,~~~~-,~-~~-~-~~~~~~~ ~ Mean 8.7
,
,
,
:
,
,
~
.
,
StDev 1.238
:~ rt==~=t==~=i==t=4==t=~==t==~~:~-r.-r~~t=i==t=~: N 31
so ~--t--:--t--r--t--r-1--+--1--+· -:- -r--t--t--1--t--: AD 0.535
70 --+--:--+--t-i--t-1--+--i-- r- -~ T--t-i--t-4--+--l- P- Value 0.157
1
~ ~ lti~U~l~~!=:=~;:fifl~~l~t~l~ttl
rrT-r-~--· :-r-rT-rT-rT_r_r_T-rT
10 11 12 13
Peroxide Values
FIGURE 6.41 The probability plot shows the data fits a normal distribution. Therefore, the
data can be used to make inferences about how well the analytical method for peroxide values
or their specification provide the degree of control for managing oxidation.