Carboxylated Multiwalled Carbon Nanotubes as Dispersive Solid-Phase Extraction Sorbent to Determine Eighteen Polychlorinated Biphenyls in Vegetable Samples by Gas Chromatography-Mass Spectrometry

<div>SIM chromatogram of 18 PCB (10 <i>μ</i>g/L) standard solutions: peaks 1–18 are PCB28, PCB52, PCB101, PCB118, PCB153, PCB138, PCB180, PCB81, PCB77, PCB123, PCB114, PCB105, PCB126, PCB167, PCB156, PCB157, PCB169, and PCB189.</div>

Journal of Analytical Methods in Chemistry

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Figure 1

Figure 1: Carboxylated Multiwalled Carbon Nanotubes as Dispersive Solid-Phase Extraction Sorbent to Determine Eighteen Polychlorinated Biphenyls in Vegetable Samples by Gas Chromatography-Mass Spectrometry 

Figure 1 | Carboxylated Multiwalled Carbon Nanotubes as Dispersive Solid-Phase Extraction Sorbent to Determine Eighteen Polychlorinated Biphenyls in Vegetable Samples by Gas Chromatography-Mass Spectrometry 