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Method 1668, Revision A
HpCB =
heptachlorobiphenyl
OcCB =
octachlorobiphenyl
NoCB =
nonachlorobiphenyl
DeCB =
decachlorobiphenyl
2.
Suffix "L" indicates labeled compound.
3.
For native CBs determined by isotope dilution quantitation, RRT QC limits were constructed using -2 to +4 seconds around the the retention
time for the labeled analog. For native CBs determined by internal standard quantitation, RRT QC limits were constructed using a ¡¾2
percent window around the retention time for retention times in the range of 0.8-1.2 and a ¡¾4 percent window around the retention time for
retention times <0.8 and >1.2. These windows may not be adequate for analyte identification (See the note in Section 16.4)
4.
Labeled level of chlorination (LOC) window-defining congener
5.
Labeled level of chlorination (LOC) quantitation congener
6.
National Oceanic and Atmospheric Administration (NOAA) congener of interest
7.
Instrument internal standard
8.
Clean-up standard
9.
Labeled internal standard for World Health Organization (WHO) toxic congener
10.
WHO toxic congener
HpCB =
heptachlorobiphenyl
OcCB =
octachlorobiphenyl
NoCB =
nonachlorobiphenyl
DeCB =
decachlorobiphenyl
2.
Suffix "L" indicates labeled compound.
3.
For native CBs determined by isotope dilution quantitation, RRT QC limits were constructed using -2 to +4 seconds around the the retention
time for the labeled analog. For native CBs determined by internal standard quantitation, RRT QC limits were constructed using a ¡¾2
percent window around the retention time for retention times in the range of 0.8-1.2 and a ¡¾4 percent window around the retention time for
retention times <0.8 and >1.2. These windows may not be adequate for analyte identification (See the note in Section 16.4)
4.
Labeled level of chlorination (LOC) window-defining congener
5.
Labeled level of chlorination (LOC) quantitation congener
6.
National Oceanic and Atmospheric Administration (NOAA) congener of interest
7.
Instrument internal standard
8.
Clean-up standard
9.
Labeled internal standard for World Health Organization (WHO) toxic congener
10.
WHO toxic congener
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