BQS OBSP Determination:
1,2,3,4-TETRAMETHYLBENZENE
METHOD: 4054 , TESTIDCODE: 49999GCM66
Open Data Set

Analysis Date = 10/04/03 SpikeMix = AccuStandard B2080329: 20 µl Pct Recovery = 78% Analysis Date = 09/10/03 SpikeMix = AccuStandard B2080329: 20 µl Pct Recovery = 108% Analysis Date = 08/01/03 SpikeMix = AccuStandard B2080329: 20 µl Pct Recovery = 106% Analysis Date = 11/15/00 SpikeMix = NSI 053100-01: 25 µl Pct Recovery = 147% Analysis Date = 08/16/00 SpikeMix = NSI 053100-01: 25 µl Pct Recovery = 114% Analysis Date = 10/03/03 Pct Recovery = 78% Analysis Date = 09/28/03 Pct Recovery = 85% Analysis Date = 09/28/03 Pct Recovery = 85% Analysis Date = 09/22/03 Pct Recovery = 93% Analysis Date = 09/22/03 Pct Recovery = 93% Analysis Date = 09/16/03 Pct Recovery = 100% Analysis Date = 09/16/03 Pct Recovery = 100% Analysis Date = 09/11/03 Pct Recovery = 107% Analysis Date = 09/11/03 Pct Recovery = 107% Analysis Date = 09/05/03 Pct Recovery = 108% Analysis Date = 09/05/03 Pct Recovery = 108% Analysis Date = 08/30/03 Pct Recovery = 108% Analysis Date = 08/30/03 Pct Recovery = 108% Analysis Date = 08/24/03 Pct Recovery = 107% Analysis Date = 08/24/03 Pct Recovery = 107% Analysis Date = 08/19/03 Pct Recovery = 107% Analysis Date = 08/19/03 Pct Recovery = 107% Analysis Date = 08/13/03 Pct Recovery = 107% Analysis Date = 08/13/03 Pct Recovery = 107% Analysis Date = 08/07/03 Pct Recovery = 106% Analysis Date = 08/07/03 Pct Recovery = 106% Analysis Date = 08/02/03 Pct Recovery = 106% Analysis Date = 08/02/03 Pct Recovery = 106% Analysis Date = 07/27/03 Pct Recovery = 106% Analysis Date = 07/27/03 Pct Recovery = 106% Analysis Date = 07/21/03 Pct Recovery = 106% Analysis Date = 07/21/03 Pct Recovery = 106% Analysis Date = 07/15/03 Pct Recovery = 106% Analysis Date = 07/15/03 Pct Recovery = 106% Analysis Date = 07/10/03 Pct Recovery = 107% Analysis Date = 07/10/03 Pct Recovery = 107% Analysis Date = 07/04/03 Pct Recovery = 107% Analysis Date = 07/04/03 Pct Recovery = 107% Analysis Date = 06/28/03 Pct Recovery = 107% Analysis Date = 06/28/03 Pct Recovery = 107% Analysis Date = 06/23/03 Pct Recovery = 107% Analysis Date = 06/23/03 Pct Recovery = 107% Analysis Date = 06/17/03 Pct Recovery = 108% Analysis Date = 06/17/03 Pct Recovery = 108% Analysis Date = 06/11/03 Pct Recovery = 108% Analysis Date = 06/11/03 Pct Recovery = 108% Analysis Date = 06/05/03 Pct Recovery = 108% Analysis Date = 06/05/03 Pct Recovery = 108% Analysis Date = 05/31/03 Pct Recovery = 108% Analysis Date = 05/31/03 Pct Recovery = 108% Analysis Date = 05/25/03 Pct Recovery = 109% Analysis Date = 05/25/03 Pct Recovery = 109% Analysis Date = 05/19/03 Pct Recovery = 109% Analysis Date = 05/19/03 Pct Recovery = 109% Analysis Date = 05/14/03 Pct Recovery = 109% Analysis Date = 05/14/03 Pct Recovery = 109% Analysis Date = 05/08/03 Pct Recovery = 109% Analysis Date = 05/08/03 Pct Recovery = 109% Analysis Date = 05/02/03 Pct Recovery = 109% Analysis Date = 05/02/03 Pct Recovery = 109% Analysis Date = 04/26/03 Pct Recovery = 110% Analysis Date = 04/26/03 Pct Recovery = 110% Analysis Date = 04/21/03 Pct Recovery = 110% Analysis Date = 04/21/03 Pct Recovery = 110% Analysis Date = 04/15/03 Pct Recovery = 110% Analysis Date = 04/15/03 Pct Recovery = 110% Analysis Date = 04/09/03 Pct Recovery = 110% Analysis Date = 04/09/03 Pct Recovery = 110% Analysis Date = 04/04/03 Pct Recovery = 111% Analysis Date = 04/04/03 Pct Recovery = 111% Analysis Date = 03/29/03 Pct Recovery = 111% Analysis Date = 03/29/03 Pct Recovery = 111% Analysis Date = 03/23/03 Pct Recovery = 111% Analysis Date = 03/23/03 Pct Recovery = 111% Analysis Date = 03/17/03 Pct Recovery = 111% Analysis Date = 03/17/03 Pct Recovery = 111% Analysis Date = 03/12/03 Pct Recovery = 112% Analysis Date = 03/12/03 Pct Recovery = 112% Analysis Date = 03/06/03 Pct Recovery = 112% Analysis Date = 03/06/03 Pct Recovery = 112% Analysis Date = 02/28/03 Pct Recovery = 112% Analysis Date = 02/28/03 Pct Recovery = 112% Analysis Date = 02/22/03 Pct Recovery = 112% Analysis Date = 02/22/03 Pct Recovery = 112% Analysis Date = 02/17/03 Pct Recovery = 113% Analysis Date = 02/17/03 Pct Recovery = 113% Analysis Date = 02/11/03 Pct Recovery = 113% Analysis Date = 02/11/03 Pct Recovery = 113% Analysis Date = 02/05/03 Pct Recovery = 113% Analysis Date = 02/05/03 Pct Recovery = 113% Analysis Date = 01/31/03 Pct Recovery = 113% Analysis Date = 01/31/03 Pct Recovery = 113% Analysis Date = 01/25/03 Pct Recovery = 114% Analysis Date = 01/25/03 Pct Recovery = 114% Analysis Date = 01/19/03 Pct Recovery = 114% Analysis Date = 01/19/03 Pct Recovery = 114% Analysis Date = 01/13/03 Pct Recovery = 114% Analysis Date = 01/13/03 Pct Recovery = 114% Analysis Date = 01/08/03 Pct Recovery = 114% Analysis Date = 01/08/03 Pct Recovery = 114% Analysis Date = 01/02/03 Pct Recovery = 115% Analysis Date = 01/02/03 Pct Recovery = 115% Analysis Date = 12/27/02 Pct Recovery = 115% Analysis Date = 12/27/02 Pct Recovery = 115% Analysis Date = 12/22/02 Pct Recovery = 115% Analysis Date = 12/22/02 Pct Recovery = 115% Analysis Date = 12/16/02 Pct Recovery = 115% Analysis Date = 12/16/02 Pct Recovery = 115% Analysis Date = 12/10/02 Pct Recovery = 116% Analysis Date = 12/10/02 Pct Recovery = 116% Analysis Date = 12/04/02 Pct Recovery = 116% Analysis Date = 12/04/02 Pct Recovery = 116% Analysis Date = 11/29/02 Pct Recovery = 116% Analysis Date = 11/29/02 Pct Recovery = 116% Analysis Date = 11/23/02 Pct Recovery = 116% Analysis Date = 11/23/02 Pct Recovery = 116% Analysis Date = 11/17/02 Pct Recovery = 116% Analysis Date = 11/17/02 Pct Recovery = 116% Analysis Date = 11/12/02 Pct Recovery = 117% Analysis Date = 11/12/02 Pct Recovery = 117% Analysis Date = 11/06/02 Pct Recovery = 117% Analysis Date = 11/06/02 Pct Recovery = 117% Analysis Date = 10/31/02 Pct Recovery = 117% Analysis Date = 10/31/02 Pct Recovery = 117% Analysis Date = 10/25/02 Pct Recovery = 117% Analysis Date = 10/25/02 Pct Recovery = 117% Analysis Date = 10/20/02 Pct Recovery = 118% Analysis Date = 10/20/02 Pct Recovery = 118% Analysis Date = 10/14/02 Pct Recovery = 118% Analysis Date = 10/14/02 Pct Recovery = 118% Analysis Date = 10/08/02 Pct Recovery = 118% Analysis Date = 10/08/02 Pct Recovery = 118% Analysis Date = 10/03/02 Pct Recovery = 118% Analysis Date = 10/03/02 Pct Recovery = 118% Analysis Date = 09/27/02 Pct Recovery = 119% Analysis Date = 09/27/02 Pct Recovery = 119% Analysis Date = 09/21/02 Pct Recovery = 119% Analysis Date = 09/21/02 Pct Recovery = 119% Analysis Date = 09/15/02 Pct Recovery = 119% Analysis Date = 09/15/02 Pct Recovery = 119% Analysis Date = 09/10/02 Pct Recovery = 119% Analysis Date = 09/10/02 Pct Recovery = 119% Analysis Date = 09/04/02 Pct Recovery = 120% Analysis Date = 09/04/02 Pct Recovery = 120% Analysis Date = 08/29/02 Pct Recovery = 120% Analysis Date = 08/29/02 Pct Recovery = 120% Analysis Date = 08/24/02 Pct Recovery = 120% Analysis Date = 08/24/02 Pct Recovery = 120% Analysis Date = 08/18/02 Pct Recovery = 120% Analysis Date = 08/18/02 Pct Recovery = 120% Analysis Date = 08/12/02 Pct Recovery = 121% Analysis Date = 08/12/02 Pct Recovery = 121% Analysis Date = 08/06/02 Pct Recovery = 121% Analysis Date = 08/06/02 Pct Recovery = 121% Analysis Date = 08/01/02 Pct Recovery = 121% Analysis Date = 08/01/02 Pct Recovery = 121% Analysis Date = 07/26/02 Pct Recovery = 121% Analysis Date = 07/26/02 Pct Recovery = 121% Analysis Date = 07/20/02 Pct Recovery = 122% Analysis Date = 07/20/02 Pct Recovery = 122% Analysis Date = 07/14/02 Pct Recovery = 122% Analysis Date = 07/14/02 Pct Recovery = 122% Analysis Date = 07/09/02 Pct Recovery = 122% Analysis Date = 07/09/02 Pct Recovery = 122% Analysis Date = 07/03/02 Pct Recovery = 122% Analysis Date = 07/03/02 Pct Recovery = 122% Analysis Date = 06/27/02 Pct Recovery = 123% Analysis Date = 06/27/02 Pct Recovery = 123% Analysis Date = 06/22/02 Pct Recovery = 123% Analysis Date = 06/22/02 Pct Recovery = 123% Analysis Date = 06/16/02 Pct Recovery = 123% Analysis Date = 06/16/02 Pct Recovery = 123% Analysis Date = 06/10/02 Pct Recovery = 123% Analysis Date = 06/10/02 Pct Recovery = 123% Analysis Date = 06/04/02 Pct Recovery = 123% Analysis Date = 06/04/02 Pct Recovery = 123% Analysis Date = 05/30/02 Pct Recovery = 124% Analysis Date = 05/30/02 Pct Recovery = 124% Analysis Date = 05/24/02 Pct Recovery = 124% Analysis Date = 05/24/02 Pct Recovery = 124% Analysis Date = 05/18/02 Pct Recovery = 124% Analysis Date = 05/18/02 Pct Recovery = 124% Analysis Date = 05/13/02 Pct Recovery = 124% Analysis Date = 05/13/02 Pct Recovery = 124% Analysis Date = 05/07/02 Pct Recovery = 125% Analysis Date = 05/07/02 Pct Recovery = 125% Analysis Date = 05/01/02 Pct Recovery = 125% Analysis Date = 05/01/02 Pct Recovery = 125% Analysis Date = 04/25/02 Pct Recovery = 125% Analysis Date = 04/25/02 Pct Recovery = 125% Analysis Date = 04/20/02 Pct Recovery = 125% Analysis Date = 04/20/02 Pct Recovery = 125% Analysis Date = 04/14/02 Pct Recovery = 126% Analysis Date = 04/14/02 Pct Recovery = 126% Analysis Date = 04/08/02 Pct Recovery = 126% Analysis Date = 04/08/02 Pct Recovery = 126% Analysis Date = 04/03/02 Pct Recovery = 126% Analysis Date = 04/03/02 Pct Recovery = 126% Analysis Date = 03/28/02 Pct Recovery = 126% Analysis Date = 03/28/02 Pct Recovery = 126% Analysis Date = 03/22/02 Pct Recovery = 127% Analysis Date = 03/22/02 Pct Recovery = 127% Analysis Date = 03/16/02 Pct Recovery = 127% Analysis Date = 03/16/02 Pct Recovery = 127% Analysis Date = 03/11/02 Pct Recovery = 127% Analysis Date = 03/11/02 Pct Recovery = 127% Analysis Date = 03/05/02 Pct Recovery = 127% Analysis Date = 03/05/02 Pct Recovery = 127% Analysis Date = 02/27/02 Pct Recovery = 128% Analysis Date = 02/27/02 Pct Recovery = 128% Analysis Date = 02/22/02 Pct Recovery = 128% Analysis Date = 02/22/02 Pct Recovery = 128% Analysis Date = 02/16/02 Pct Recovery = 128% Analysis Date = 02/16/02 Pct Recovery = 128% Analysis Date = 02/10/02 Pct Recovery = 128% Analysis Date = 02/10/02 Pct Recovery = 128% Analysis Date = 02/04/02 Pct Recovery = 129% Analysis Date = 02/04/02 Pct Recovery = 129% Analysis Date = 01/30/02 Pct Recovery = 129% Analysis Date = 01/30/02 Pct Recovery = 129% Analysis Date = 01/24/02 Pct Recovery = 129% Analysis Date = 01/24/02 Pct Recovery = 129% Analysis Date = 01/18/02 Pct Recovery = 129% Analysis Date = 01/18/02 Pct Recovery = 129% Analysis Date = 01/13/02 Pct Recovery = 130% Analysis Date = 01/13/02 Pct Recovery = 130% Analysis Date = 01/07/02 Pct Recovery = 130% Analysis Date = 01/07/02 Pct Recovery = 130% Analysis Date = 01/01/02 Pct Recovery = 130% Analysis Date = 01/01/02 Pct Recovery = 130% Analysis Date = 12/26/01 Pct Recovery = 130% Analysis Date = 12/26/01 Pct Recovery = 130% Analysis Date = 12/21/01 Pct Recovery = 130% Analysis Date = 12/21/01 Pct Recovery = 130% Analysis Date = 12/15/01 Pct Recovery = 131% Analysis Date = 12/15/01 Pct Recovery = 131% Analysis Date = 12/09/01 Pct Recovery = 131% Analysis Date = 12/09/01 Pct Recovery = 131% Analysis Date = 12/03/01 Pct Recovery = 131% Analysis Date = 12/03/01 Pct Recovery = 131% Analysis Date = 11/28/01 Pct Recovery = 131% Analysis Date = 11/28/01 Pct Recovery = 131% Analysis Date = 11/22/01 Pct Recovery = 132% Analysis Date = 11/22/01 Pct Recovery = 132% Analysis Date = 11/16/01 Pct Recovery = 132% Analysis Date = 11/16/01 Pct Recovery = 132% Analysis Date = 11/11/01 Pct Recovery = 132% Analysis Date = 11/11/01 Pct Recovery = 132% Analysis Date = 11/05/01 Pct Recovery = 132% Analysis Date = 11/05/01 Pct Recovery = 132% Analysis Date = 10/30/01 Pct Recovery = 133% Analysis Date = 10/30/01 Pct Recovery = 133% Analysis Date = 10/24/01 Pct Recovery = 133% Analysis Date = 10/24/01 Pct Recovery = 133% Analysis Date = 10/19/01 Pct Recovery = 133% Analysis Date = 10/19/01 Pct Recovery = 133% Analysis Date = 10/13/01 Pct Recovery = 133% Analysis Date = 10/13/01 Pct Recovery = 133% Analysis Date = 10/07/01 Pct Recovery = 134% Analysis Date = 10/07/01 Pct Recovery = 134% Analysis Date = 10/02/01 Pct Recovery = 134% Analysis Date = 10/02/01 Pct Recovery = 134% Analysis Date = 09/26/01 Pct Recovery = 134% Analysis Date = 09/26/01 Pct Recovery = 134% Analysis Date = 09/20/01 Pct Recovery = 134% Analysis Date = 09/20/01 Pct Recovery = 134% Analysis Date = 09/14/01 Pct Recovery = 135% Analysis Date = 09/14/01 Pct Recovery = 135% Analysis Date = 09/09/01 Pct Recovery = 135% Analysis Date = 09/09/01 Pct Recovery = 135% Analysis Date = 09/03/01 Pct Recovery = 135% Analysis Date = 09/03/01 Pct Recovery = 135% Analysis Date = 08/28/01 Pct Recovery = 135% Analysis Date = 08/28/01 Pct Recovery = 135% Analysis Date = 08/23/01 Pct Recovery = 136% Analysis Date = 08/23/01 Pct Recovery = 136% Analysis Date = 08/17/01 Pct Recovery = 136% Analysis Date = 08/17/01 Pct Recovery = 136% Analysis Date = 08/11/01 Pct Recovery = 136% Analysis Date = 08/11/01 Pct Recovery = 136% Analysis Date = 08/05/01 Pct Recovery = 136% Analysis Date = 08/05/01 Pct Recovery = 136% Analysis Date = 07/31/01 Pct Recovery = 137% Analysis Date = 07/31/01 Pct Recovery = 137% Analysis Date = 07/25/01 Pct Recovery = 137% Analysis Date = 07/25/01 Pct Recovery = 137% Analysis Date = 07/19/01 Pct Recovery = 137% Analysis Date = 07/19/01 Pct Recovery = 137% Analysis Date = 07/14/01 Pct Recovery = 137% Analysis Date = 07/14/01 Pct Recovery = 137% Analysis Date = 07/08/01 Pct Recovery = 137% Analysis Date = 07/08/01 Pct Recovery = 137% Analysis Date = 07/02/01 Pct Recovery = 138% Analysis Date = 07/02/01 Pct Recovery = 138% Analysis Date = 06/26/01 Pct Recovery = 138% Analysis Date = 06/26/01 Pct Recovery = 138% Analysis Date = 06/21/01 Pct Recovery = 138% Analysis Date = 06/21/01 Pct Recovery = 138% Analysis Date = 06/15/01 Pct Recovery = 138% Analysis Date = 06/15/01 Pct Recovery = 138% Analysis Date = 06/09/01 Pct Recovery = 139% Analysis Date = 06/09/01 Pct Recovery = 139% Analysis Date = 06/04/01 Pct Recovery = 139% Analysis Date = 06/04/01 Pct Recovery = 139% Analysis Date = 05/29/01 Pct Recovery = 139% Analysis Date = 05/29/01 Pct Recovery = 139% Analysis Date = 05/23/01 Pct Recovery = 139% Analysis Date = 05/23/01 Pct Recovery = 139% Analysis Date = 05/17/01 Pct Recovery = 140% Analysis Date = 05/17/01 Pct Recovery = 140% Analysis Date = 05/12/01 Pct Recovery = 140% Analysis Date = 05/12/01 Pct Recovery = 140% Analysis Date = 05/06/01 Pct Recovery = 140% Analysis Date = 05/06/01 Pct Recovery = 140% Analysis Date = 04/30/01 Pct Recovery = 140% Analysis Date = 04/30/01 Pct Recovery = 140% Analysis Date = 04/24/01 Pct Recovery = 141% Analysis Date = 04/24/01 Pct Recovery = 141% Analysis Date = 04/19/01 Pct Recovery = 141% Analysis Date = 04/19/01 Pct Recovery = 141% Analysis Date = 04/13/01 Pct Recovery = 141% Analysis Date = 04/13/01 Pct Recovery = 141% Analysis Date = 04/07/01 Pct Recovery = 141% Analysis Date = 04/07/01 Pct Recovery = 141% Analysis Date = 04/02/01 Pct Recovery = 142% Analysis Date = 04/02/01 Pct Recovery = 142% Analysis Date = 03/27/01 Pct Recovery = 142% Analysis Date = 03/27/01 Pct Recovery = 142% Analysis Date = 03/21/01 Pct Recovery = 142% Analysis Date = 03/21/01 Pct Recovery = 142% Analysis Date = 03/15/01 Pct Recovery = 142% Analysis Date = 03/15/01 Pct Recovery = 142% Analysis Date = 03/10/01 Pct Recovery = 143% Analysis Date = 03/10/01 Pct Recovery = 143% Analysis Date = 03/04/01 Pct Recovery = 143% Analysis Date = 03/04/01 Pct Recovery = 143% Analysis Date = 02/26/01 Pct Recovery = 143% Analysis Date = 02/26/01 Pct Recovery = 143% Analysis Date = 02/21/01 Pct Recovery = 143% Analysis Date = 02/21/01 Pct Recovery = 143% Analysis Date = 02/15/01 Pct Recovery = 144% Analysis Date = 02/15/01 Pct Recovery = 144% Analysis Date = 02/09/01 Pct Recovery = 144% Analysis Date = 02/09/01 Pct Recovery = 144% Analysis Date = 02/03/01 Pct Recovery = 144% Analysis Date = 02/03/01 Pct Recovery = 144% Analysis Date = 01/29/01 Pct Recovery = 144% Analysis Date = 01/29/01 Pct Recovery = 144% Analysis Date = 01/23/01 Pct Recovery = 144% Analysis Date = 01/23/01 Pct Recovery = 144% Analysis Date = 01/17/01 Pct Recovery = 145% Analysis Date = 01/17/01 Pct Recovery = 145% Analysis Date = 01/12/01 Pct Recovery = 145% Analysis Date = 01/12/01 Pct Recovery = 145% Analysis Date = 01/06/01 Pct Recovery = 145% Analysis Date = 01/06/01 Pct Recovery = 145% Analysis Date = 12/31/00 Pct Recovery = 145% Analysis Date = 12/31/00 Pct Recovery = 145% Analysis Date = 12/25/00 Pct Recovery = 146% Analysis Date = 12/25/00 Pct Recovery = 146% Analysis Date = 12/20/00 Pct Recovery = 146% Analysis Date = 12/20/00 Pct Recovery = 146% Analysis Date = 12/14/00 Pct Recovery = 146% Analysis Date = 12/14/00 Pct Recovery = 146% Analysis Date = 12/08/00 Pct Recovery = 146% Analysis Date = 12/08/00 Pct Recovery = 146% Analysis Date = 12/03/00 Pct Recovery = 147% Analysis Date = 12/03/00 Pct Recovery = 147% Analysis Date = 11/27/00 Pct Recovery = 147% Analysis Date = 11/27/00 Pct Recovery = 147% Analysis Date = 11/21/00 Pct Recovery = 147% Analysis Date = 11/21/00 Pct Recovery = 147% Analysis Date = 11/15/00 Pct Recovery = 147% Analysis Date = 11/15/00 Pct Recovery = 147% Analysis Date = 11/10/00 Pct Recovery = 145% Analysis Date = 11/10/00 Pct Recovery = 145% Analysis Date = 11/04/00 Pct Recovery = 143% Analysis Date = 11/04/00 Pct Recovery = 143% Analysis Date = 10/29/00 Pct Recovery = 141% Analysis Date = 10/29/00 Pct Recovery = 141% Analysis Date = 10/24/00 Pct Recovery = 139% Analysis Date = 10/24/00 Pct Recovery = 139% Analysis Date = 10/18/00 Pct Recovery = 137% Analysis Date = 10/18/00 Pct Recovery = 137% Analysis Date = 10/12/00 Pct Recovery = 135% Analysis Date = 10/12/00 Pct Recovery = 135% Analysis Date = 10/06/00 Pct Recovery = 133% Analysis Date = 10/06/00 Pct Recovery = 133% Analysis Date = 10/01/00 Pct Recovery = 131% Analysis Date = 10/01/00 Pct Recovery = 131% Analysis Date = 09/25/00 Pct Recovery = 129% Analysis Date = 09/25/00 Pct Recovery = 129% Analysis Date = 09/19/00 Pct Recovery = 127% Analysis Date = 09/19/00 Pct Recovery = 127% Analysis Date = 09/13/00 Pct Recovery = 124% Analysis Date = 09/13/00 Pct Recovery = 124% Analysis Date = 09/08/00 Pct Recovery = 122% Analysis Date = 09/08/00 Pct Recovery = 122% Analysis Date = 09/02/00 Pct Recovery = 120% Analysis Date = 09/02/00 Pct Recovery = 120% Analysis Date = 08/27/00 Pct Recovery = 118% Analysis Date = 08/27/00 Pct Recovery = 118% Analysis Date = 08/22/00 Pct Recovery = 116% Analysis Date = 08/22/00 Pct Recovery = 116% Analysis Date = 08/16/00 Pct Recovery = 114% Y = 1.5 Y = 0.5 Y = 1
The SGPlot Procedure

Plotted Points Statistics
1,2,3,4-TETRAMETHYLBENZENE

Spike Level N Mean Std-Dev. Median F_Pseudo
>= Reporting Level 5 111% 25% 108% 6%
Total 5 111% 25% 108% 6%

Sample Statistics
1,2,3,4-TETRAMETHYLBENZENE

Characteristic N % % Basis
Plotted 5 100% Spiked
Estimated Values 1 20% Spiked
Deleted Values 0 0% Spiked + Not Spiked
Spiked, Censored 0 0% Spiked
Spiked 5 .  
False Negatives 0 0% 0 out of 5
Not Spiked 31 .  
False Positives 0 0% 0 out of 31