Shimadzu Techno-Research Inc., Japan - UNEP Chemicals

CV%rob
��Trends Trends of CV % rob of round robin study in
soil sample
30%
25%
20%
15%
10%
5%
0%
123789-HxCDD
1234678-HpCDD
OCDD
2378-TeCDF
12378-PeCDF
23478-PeCDF
123478-HxCDF
123678-HxCDF
123789-HxCDF
234678-HxCDF
1234678-HpCDF
1234789-HpCDF
OCDF
344'5-TeCB(#81)
2378-TeCDD
12378-PeCDD
123478-HxCDD
123678-HxCDD
Isomer
33'44'-TeCB(#77)
33'44'5-PeCB(#126)
33'44'55'-HxCB(#169)
2'344'5-PeCB(#123)
23'44'5-PeCB(#118)
233'44'-PeCB(#105)
2344'5-PeCB(#114)
23'44'55'-HxCB(#167)
233'44'5-HxCB(#156)
233'44'5'-HxCB(#157)
233'44'55'-HpCB(#189)
TOTAL TEQ
2nd round robin study 4th round robin study 5th round robin study
SHIMADZU TECHNO RESEARCH, Inc.
different results of 1,2,3,7,8-PeCDF using different GC phase
Type of GCcolumn
SP-2331, CP-
Sil88
BPX-DXN, DBtype,
RH-12MS
Lab.No. Average
(pg/g)
Max Min SD Median NIQR CV%
rob
48 4.64 5.50 3.80 0.42 4.63 0.33 7.11
29 3.30 6.20 2.20 0.66 3.20 0.32 9.85
different results of 1,2,3,4,7,8-HxCDF using different GC phase
Type of GCcolumn
SP-2331, CP-
Sil88
BPX-DXN, DBtype,
RH-12MS
Differences of analytical results by different GC phase
Lab.No. Average
(pg/g)
Max Min SD Median NIQR CV%
rob
48 6.51 8.20 5.40 0.58 6.51 0.52 7.97
29 5.65 8.80 4.10 0.78 5.63 0.48 8.57
These results indicates that different GC phase shows different results especially for
1,2,3,7,8-PeCDF. The main causes of this differences are due to co-eluting congeners for
polar GC phase (SP-2331 or CP-Sil88)
SHIMADZU TECHNO RESEARCH, Inc.