Low levels of persistent organic pollutants in sediments of the Doce River mouth, South Atlantic, before the Fundão dam failure

Review of scientific literature on available methods of assessing organochlorine pesticides in the environment

“…The capillary temperature and probe heater temperature were set at 325 °C and 350 °C, respectively, and the spray voltage was 3000 V, RT: 0.49–9.90” [ 68 ] Sediment 19 0.01–0.59 71–106 3–19 GC-MS: “The temperature program was: initial temperature: 60 °C, 6 °C/min to 290 °C (10 min). The carrier gas was nitrogen at a flow rate of 1.2 mL/min” [ 178 ] Sediment 18 0.04–0.20 Blank and sample spiked surrogate: 90.25–110.49 <35 GC-MS: “The oven temperature programming was set to start at 50 °C, holding for 3 min, increased to 300 °C at a heating rate of 12 °C/min, and holding to 45min” [ 179 ] Sediment 18 0.01–0.20 >87 GC-ECD: “initial temperature: 120 °C, 15 °C/min to 210 °C (1 min), 2 °C/min to 245 °C (1 min), 30 °C/min to 290 °C (3 min)” [ 37 ] Sediment HCHs and DDTs 0.00188 to 0.013 for HCHs, 0.00017 to 0.0123 for DDTs Surrogates: 51-85 GC-MS-ECNI [ 180 ] Sediment 7 0.02–0.16 Surrogate: 52–118; individual recoveries: 71–107; spiked sediment and blank: 75-112 GC-ECD: “The following oven heating ramp was used: (1) 100 °C for 1 min, (2) 100–140 °C at 5 °C/min for 1 min, (3) 140–250 °C at 1.5 °C/min for 1 min, and (4) 250–300 °C at 10 °C/min for 10 min (total run = 90 min)” [ 102 ] Sediment 22 MDL: 0.10–1.59 0.34–5.30 87–118 GC-HRMS: “120 °C(0.5 min) to 180 °C at 10 °C min. −1 to 210 °C at 4 °C min.…”

Optimization and validation of ultrasound application with a low-temperature method to analyze organochlorine pesticides in smuggled cigarette tobacco

“…1,2 They are synthesized compounds classied as chlorinated hydrocarbons with a lipophilic character, implying permanence for many years in the environment. [3][4][5] Worldwide, there have been many studies on OCPs in different matrices, seeking to evaluate the impact of these compounds on the environment. The tobacco matrix is an exciting indicator for OCPs.…”