This document describes the use of Agilent 6820 gas chromatograph (GC) with micro-electron capture detector (µECD) to analyze organochlorine and pyrethroid compounds. The sensitivity provided by µECD was much better than the requirements of the routine pesticide residue analysis.
The document describes the use of the Agilent 6820 gas chromatograph equipped with a high-sensitivity hECD to analyze organochlorine and pyrethroid compounds. The system was evaluated against Chinese National Standard Method GB/T 5009.146-2003, demonstrating good linearity and sensitivity across wide concentration ranges.
| Detector Type | hECD (high-sensitivity Electron Capture Detector) |
|---|---|
| Column Type | HP-1, 30 m x 0.32 mm x 0.25 µm |
| Carrier Gas | Nitrogen, constant head pressure mode |
| Oven Temperature Program | 60 °C (1 min), 30 °C/min to 180 °C, 5 °C/min to 260 °C (5 min), 3 °C/min to 280 °C (10 min) |
| Detector Temperature | 330 °C |
| Linear Correlation Coefficient (R²) | > 0.995 for all compounds |
The study analyzed organochlorine and pyrethroid compounds, including BHCs, heptachlor, aldrin, endosulfan, DDT derivatives, fenpropathrin, cyhalothrin, permethrin, cypermethrin, fenvalerate, and deltamethrin.
Yes, the system shows good sensitivity and a wide linear range that are much better than routine pesticide residue analysis requirements.