BQS Organic Blind Sample Program
False Positives & False Negatives
TERT-BUTYL_METHYL_ETHER_(MTBE)
Method: 4437 Testid: 78032GM016
Open Data Set

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newdate = 08/24/15 falseneg = -0.01 newdate = 06/03/16 falsepos = 0.018 newdate = 08/12/16 CENC_VAL = 0.029 newdate = 08/11/16 CENC_VAL = 0.081 newdate = 07/29/16 CENC_VAL = 0.111 newdate = 07/27/16 CENC_VAL = 0.039 newdate = 07/06/16 CENC_VAL = 0.089 newdate = 07/06/16 CENC_VAL = 0.040 newdate = 06/23/16 CENC_VAL = 0.036 newdate = 06/03/16 CENC_VAL = 0.018 newdate = 05/21/16 CENC_VAL = 0.070 newdate = 05/20/16 CENC_VAL = 0.037 newdate = 04/28/16 CENC_VAL = 0.030 newdate = 03/22/16 CENC_VAL = 0.022 newdate = 02/12/16 CENC_VAL = 0.017 newdate = 01/05/16 CENC_VAL = 0.019 newdate = 12/10/15 CENC_VAL = 0.019 newdate = 11/25/15 CENC_VAL = 0.026 newdate = 10/09/15 CENC_VAL = 0.050 newdate = 10/09/15 CENC_VAL = 0.042 newdate = 09/05/15 CENC_VAL = 0.026 newdate = 07/30/15 CENC_VAL = 0.031 newdate = 06/26/15 CENC_VAL = 0.044 newdate = 05/20/15 CENC_VAL = 0.020 newdate = 05/14/15 CENC_VAL = 0.033 newdate = 05/05/15 CENC_VAL = 0.021 newdate = 04/25/15 CENC_VAL = 0.027 newdate = 01/10/15 CENC_VAL = 0.049 newdate = 11/22/14 CENC_VAL = 0.022 newdate = 10/21/14 CENC_VAL = 0.040 newdate = 09/06/14 CENC_VAL = 0.025 newdate = 08/13/14 CENC_VAL = 0.077 newdate = 07/30/14 CENC_VAL = 0.021 newdate = 07/11/14 CENC_VAL = 0.064 newdate = 07/03/14 CENC_VAL = 0.053 newdate = 06/07/14 CENC_VAL = 0.047 newdate = 06/06/14 CENC_VAL = 0.047 newdate = 05/20/14 CENC_VAL = 0.036 newdate = 08/12/16 REPORTING LEVEL = 0.012 newdate = 08/11/16 REPORTING LEVEL = 0.012 newdate = 08/11/16 REPORTING LEVEL = 0.012 newdate = 07/29/16 REPORTING LEVEL = 0.012 newdate = 07/29/16 REPORTING LEVEL = 0.012 newdate = 07/27/16 REPORTING LEVEL = 0.012 newdate = 07/27/16 REPORTING LEVEL = 0.012 newdate = 07/06/16 REPORTING LEVEL = 0.012 newdate = 07/06/16 REPORTING LEVEL = 0.012 newdate = 07/06/16 REPORTING LEVEL = 0.012 newdate = 07/06/16 REPORTING LEVEL = 0.012 newdate = 06/23/16 REPORTING LEVEL = 0.012 newdate = 06/23/16 REPORTING LEVEL = 0.012 newdate = 06/03/16 REPORTING LEVEL = 0.012 newdate = 06/03/16 REPORTING LEVEL = 0.012 newdate = 05/21/16 REPORTING LEVEL = 0.012 newdate = 05/21/16 REPORTING LEVEL = 0.012 newdate = 05/20/16 REPORTING LEVEL = 0.012 newdate = 05/20/16 REPORTING LEVEL = 0.012 newdate = 04/28/16 REPORTING LEVEL = 0.012 newdate = 04/28/16 REPORTING LEVEL = 0.012 newdate = 03/22/16 REPORTING LEVEL = 0.012 newdate = 03/22/16 REPORTING LEVEL = 0.012 newdate = 02/12/16 REPORTING LEVEL = 0.012 newdate = 02/12/16 REPORTING LEVEL = 0.012 newdate = 01/05/16 REPORTING LEVEL = 0.012 newdate = 01/05/16 REPORTING LEVEL = 0.012 newdate = 12/10/15 REPORTING LEVEL = 0.012 newdate = 12/10/15 REPORTING LEVEL = 0.012 newdate = 11/25/15 REPORTING LEVEL = 0.012 newdate = 11/25/15 REPORTING LEVEL = 0.012 newdate = 10/09/15 REPORTING LEVEL = 0.012 newdate = 10/09/15 REPORTING LEVEL = 0.012 newdate = 10/09/15 REPORTING LEVEL = 0.012 newdate = 10/09/15 REPORTING LEVEL = 0.012 newdate = 09/05/15 REPORTING LEVEL = 0.012 newdate = 09/05/15 REPORTING LEVEL = 0.012 newdate = 08/24/15 REPORTING LEVEL = 0.012 newdate = 08/24/15 REPORTING LEVEL = 0.012 newdate = 07/30/15 REPORTING LEVEL = 0.012 newdate = 07/30/15 REPORTING LEVEL = 0.012 newdate = 06/26/15 REPORTING LEVEL = 0.012 newdate = 06/26/15 REPORTING LEVEL = 0.012 newdate = 05/20/15 REPORTING LEVEL = 0.012 newdate = 05/20/15 REPORTING LEVEL = 0.012 newdate = 05/14/15 REPORTING LEVEL = 0.012 newdate = 05/14/15 REPORTING LEVEL = 0.012 newdate = 05/05/15 REPORTING LEVEL = 0.012 newdate = 05/05/15 REPORTING LEVEL = 0.012 newdate = 04/25/15 REPORTING LEVEL = 0.012 newdate = 04/25/15 REPORTING LEVEL = 0.012 newdate = 01/10/15 REPORTING LEVEL = 0.012 newdate = 01/10/15 REPORTING LEVEL = 0.012 newdate = 11/22/14 REPORTING LEVEL = 0.012 newdate = 11/22/14 REPORTING LEVEL = 0.012 newdate = 10/21/14 REPORTING LEVEL = 0.012 newdate = 10/21/14 REPORTING LEVEL = 0.012 newdate = 09/06/14 REPORTING LEVEL = 0.012 newdate = 09/06/14 REPORTING LEVEL = 0.012 newdate = 08/13/14 REPORTING LEVEL = 0.012 newdate = 08/13/14 REPORTING LEVEL = 0.012 newdate = 07/30/14 REPORTING LEVEL = 0.012 newdate = 07/30/14 REPORTING LEVEL = 0.012 newdate = 07/11/14 REPORTING LEVEL = 0.012 newdate = 07/11/14 REPORTING LEVEL = 0.012 newdate = 07/03/14 REPORTING LEVEL = 0.012 newdate = 07/03/14 REPORTING LEVEL = 0.012 newdate = 06/07/14 REPORTING LEVEL = 0.012 newdate = 06/07/14 REPORTING LEVEL = 0.012 newdate = 06/06/14 REPORTING LEVEL = 0.012 newdate = 06/06/14 REPORTING LEVEL = 0.012 newdate = 05/20/14 REPORTING LEVEL = 0.012 Y = 0
The SGPlot Procedure

Updated 07/06/2017

False Positive & Negative Listing for TERT-BUTYL_METHYL_ETHER_(MTBE)

Status Lab ID Spike Mix Reporting Level Analysis Date Result Conc. Expected Conc.
False Negative 20152330040 ERA 0601-15-05: 15 µl & Supelco LC13544: 15 µl 0.012 08/24/15 < 0.0251 0.027
False Positive 20161540129 NSI 041516: 15 µl & Phenova B20160303: 15 µl & NSI 041416HVOC: 15 µl 0.012 06/03/16 . 0.018 0

Updated 07/06/2017