Analytical methods

ExperimentID EXA000748
ChemicalID CH0001172
Chemical Name cis-Heptachlor epoxide
Official Method No
Chromatography GC
Chromatography mfr. 6890, Agilent; 7890, Agilent
Column RH-12ms 30 m x 0.25 mm
Column mfr. INVENTX
Detector HRMS
Detector mfr. AutoSpec Ultima, Waters; AutoSpec Premier, Waters
Ionization SIM-EI
Extraction SPE
Extraction Details Sequentially extracted with glass fiber filter GC50 and with SPE disk C18FF; Ultrasonic extraction with Acetone 50 mL, 20 min. x 3 times
Clean-up 1st Column cleanup
Clean-up 1st Details Column cleanup: Florisil, Anhydrous sodium sulfate; Remove interfering substance with Hexane; Eluted with Dichloromethane/Hexane (20:80)
Clean-up 2nd Column cleanup
Clean-up 2nd Details ENVI-Carb; Eluted with Hexane; (This Cleanup process is only for the samples with lots of interfering substances)
Clean-up Spike 13C10-cis-heptachlor epoxide
Syringe Spike 13C12-PCB#9, #19, #70, #111, #155, #178, or #202
Recovery Correction
Instrument Detection Limit
Instrument Quantification Limit
Method Detection Limit 0.9 pg/L
Method Quantification Limit 2.3 pg/L
Recovery (CRM)
Recovery (spiked)
Recovery (IS)
Remarks Analysis method: p.2; Resolution: 10,000
RegisterDate 2023/1/26
UpdateDate 2023/1/26