1516
P
OITEVINETAL.
: J
OURNALOF
AOACI
NTERNATIONAL
V
OL
. 92,N
O
. 5, 2009
Table 30. Statistical analysisof nineelementsdetermined in foodproducts testedby ICP-AES
Statistic
Ca
Cu
Fe
K
Mg
Mn
Na
P
Zn
Peanut butter
Foundmean level,mg/kg
416
4.94
15.9
6157
1753
16.0
4886
3446
26.8
Certifiedvalue,mg/kg
411
4.93
16.4
6070
1680
16.0
4890
3378
26.3
SD
R
,mg/kg
21
0.31
2.4
118
116
1.3
122
88
1.6
z
-score
0.2
0.03
–0.2
0.7
0.6
0
–0.03
0.8
0.3
Chocolatemilkpowder
Foundmean level,mg/kg
9712
5.92
166.2
9006
1751
7.53
1937
4127
18.5
Certifiedvalue,mg/kg
9870
NA
a
169.9
9090
1779
NA
1990
4080
NA
SD
R
,mg/kg
280
0.41
7.4
166
54
0.49
42
123
0.9
z
-score
–0.6
–0.5
–0.5
–0.5
–1.3
0.4
Infant cereals
Foundmean level,mg/kg
5972
1.94
74.8
6466
860
16.5
997
4302
36.7
Certifiedvalue,mg/kg
6000
NA
80.4
6500
881
NA
1050
4320
NA
SD
R
,mg/kg
290
0.23
3.9
124
47
1.5
55
91
1.4
z
-score
–0.1
–1.4
–0.3
–0.5
–1
–0.2
Dieteticmilkpowder 2
Foundmean level,mg/kg
5696
6.09
81.9
6431
441
0.407
1767
3760
53.6
Certifiedvalue,mg/kg
5780
6.1
81.1
6420
444
0.405
1840
3720
51
SD
R
,mg/kg
218
0.4
3.6
76
13
0.029
46
122
2.4
z
-score
–0.4
–0.02
0.2
0.1
–0.2
0.1
–1.6
0.3
1.1
Wheat gluten
Foundmean level,mg/kg
365
5.77
49.8
413
483
13
1353
2053
49.9
Certifiedvalue,mg/kg
369
5.94
54.3
472
510
14.3
1420
2190
53.8
SD
R
,mg/kg
15
0.26
2.1
32
15
1.2
41
68
2.3
z
-score
–0.3
–0.7
–2.2
–1.8
–1.8
–1.1
–1.6
–2
–1.7
a
NA=Not available.
MTE-01
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