Dionex ionpac as14 ic column

Bromide (C₀ = 100 mg/L $${\mathrm{Br}}^{-}$$ ) was revealed with a Dionex ICS-1000 IC ion chromatograph (Sunnyvale, CA, USA), with a conductivity cell detector equipped with a Dionex AS-40 Autosampler, a Dionex IonPac™ AG14 precolumn (4 × 50 mm), and a Dionex IonPac™ AS14 IC column with a 4 mm AESR 500 suppressor (Thermo Fisher Scientific, Chelmsford, MA, USA). The eluent phase was prepared with 3.5 mM Na₂CO₃ and 1.0 mM NaHCO₃, with 1.2 mL/min as the flow rate. On the other hand, for the test performed with NaCl (C₀ = 0.02 M), a HandyLab^® 330 conductometer (SI Analytics, Weilheim, Germany) was used to measure the conductivity variation. The data were processed by drawing the F curve (C/C₀) against time.

Sulfates were determined with ionic chromatography “Dionex ICS-1000 IC” (Sunnyvale, CA, USA) ICS-1000 IC with a conductivity cell detector equipped with a Dionex AS-40 Auto sampler. Pre-column Dionex IonPac™ AG14 (4 mm × 50 mm) and a Dionex IonPac™ AS14 IC Column with suppressor AESR 500 4 mm (Thermo Fisher Scientific Chelmsford, MA, USA) were used. The eluent phase was prepared with 3.5 mM Na₂CO₃ and 1.0 mM NaHCO₃ solutions with 1.2 mL/min as the flow rate. The calibration curve was realized from 5 to 100 mg/L of the corresponding salt Na₂SO₄, Sigma-Aldrich^® (St. Louis, MO, USA).

TCE was determined with gas chromatography (GC) DANI MASTER, equipped with DANI 86.50 headspace auto-sampler ((DANI Instruments, Contone, Switzerland): capillary column (30 m × 0.53 mm ID × 3 um, TRB624) and a Flame Ionization Detector (FID) was used. The headspace analysis program was performed as follows: oven temperature 80 °C, manifold T 120 °C, transfer line temperature 180 °C, shaking softly for 1 min. The GC conditions were: He carrier gas (flow 10 mL min⁻¹), 180 °C injector temperature split injection 1:2; 300 °C detector temperature with air, N₂ and H₂ for the FID (flows 240, 25, 60 mL min⁻¹). The oven temperature was programmed as follows: 70 °C 0.5 min, 30 °C min⁻¹ to 90 °C then 30 °C min⁻¹ to 180 °C. For the quantitative determination of TCE, a calibration curve was obtained by dilution of a TCE/Ethanol stock solution in standards with concentration range 0.1–5 mg L⁻¹.
Bromide was revealed with ion chromatograph Dionex (Sunnyvale, CA, USA) ICS-1000 IC with conductivity cell detector, equipped with Dionex AS-40 Auto sampler. Pre-column Dionex IonPac™ AG14 (4 × 50 mm) and a Dionex IonPac™ AS14 IC Column with suppressor AESR 500 4 mm (Thermo Fisher Scientific Chelmsford, MA, USA). The eluent phase was prepared with 3.5 mM Na₂CO₃ and 1.0 mM NaHCO₃ with 1.2 mL min⁻¹ as flow rate. The calibration curve was realized from 5 to 100 mg L⁻¹.