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Development of Candidate Reference Materials of Endosulfan Sulfate and Bifenthrin in Black Tea | Aryana | Indonesian Journal of Chemistry 21180 40265 1 PB

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Fig 1. Chromatograms of (a) the black tea sample; (b) the target analytes and internal standard; and (c) the spikedblack tea sample.oven temperature: 70 °C hold for 1 min, increase the temperature by 20 °C/min until reach 150 °C, increase the temperature by2 °C/min until reach 200 °C, increase the temperature by 5 °C/min until reach 280 °C and hold for 10 min; injector temperature (Operating condition of the GC-µECD instrument: type of instrument Agilent 6890; DB-5 capillary column,dimension 250 mm × 250 µm × 30 m; carrier gas Helium with flow rate 1 mL/min; make up gas Nitrogen with flow rate 60 mL/min,250 °C; detector temperature 300 °C; splitless injection mode; injection volume1 µL)
Table 5. Summary of uncertainty components contributed to the certified valueEndosulfan sulfateBifenthrin

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