Table 8.5
Intercomparsion study, determination of lead and cadmium in crab and lobster (from [552])
Sample
5 crabmeat
(sample a)
5c lobster
(sample b)
pancreas
(sample
c)
Sample preparation
chopped pieces blasts frozen, freeze
dried and ground to fine flour
prepared in form
of acetone powder
Number Elements
of partici- determined
pants
52
Cd
32
Pb
Pb
• AAS, I CP AES and isotope dilution solid source mass spectrometry
Range
of Mean SD
values
(J.UIlol
kg-I)
determined
4.7 - 9.9 7.1
1.2
0.53-15.4 3.6
2.5
1.44-14.4 3.36
1.6
CV %
Nominal
Value
Mean
17 c
7.0
7l c
12
4.7
2.5
CV
4
4
Analysis byalternative
methods'
Mean
CV
12.8
17
1.6
18 h
b
If this taken as true lead content, then 9 out of 31 produced mean values which fell within the limits for the true concentrations
c
[552]
s::
~
~
......
~