False Positive & Negative Listing for 2,4-D

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The SGPlot Procedure

Updated 06/06/2013


False Positive & Negative Listing for 2,4-D + 2,4-D METHYL ESTER (SUM)

Status Lab ID Spike Mix Reporting Level Analysis Date Result Conc. Expected Conc.
False Negative 20073380128 Abs 071607LC: 50 µl 0.02 01/03/08 < 0 0.5205
False Positive 20121670022 Supelco LB92941: 20 µl 0.06 07/09/12 E 0.46 0
  20121810017 Spex Organics T1120525009: 50 µl & Supelco LB92941: 50 µl 0.06 07/18/12 E 1.11 0
  20122020005 NSI 062612-01: 20 µl & NSI 718L-01-01: 20 µl & ChemService 396400: 20 µl 0.06 08/07/12 E 0.675 0
  20122300023 Spex Organics T1120525009: 20 µl & NSI 062612-01: 20 µl & NSI 718L-01-01: 20 µl 0.06 09/13/12 E 0.407 0
  20122570123 NSI 062612-01: 20 µl & NSI 718L-01-01: 20 µl & Restek A088383: 20 µl 0.06 09/28/12 E 0.687 0
  20123140094 Abs 052312: 20 µl & NSI 062612-01: 20 µl & NSI 718L-01-01: 20 µl 0.06 12/05/12 E 0.37 0
  20123260035 Supelco LB92941: 20 µl & ChemService 396400: 20 µl 0.06 12/05/12 E 0.361 0

Updated 06/06/2013