This experiment was performed to determine chloride and sulfate in a highly viscous oil sample applying sample combustion before anion chromatography with conductivity detection after sequential suppression.
The sample is viscous oil, 40mg sample, Mitsubishi AQF-100 was combusted at 1000°C. The combustion gases were collected in ultrapure water containing 300 ppm H2O2 and subsequently injected.
Figure 1. Determination of chloride and sulfate (not quantified) in a highly viscous petrochemical sample applying sample combustion followed by anion chromatography with conductivity detection after sequential suppression. The sample has a particularly high sulfate content.
||Mean (injected) [mg/L]
||Mean (in sample) [mg/kg]
|Phosphate (internal standard)
The experiment details are as follows:
- Sample - Viscous oil
- Sample Preparation – Combustion
- Eluent: 3.2mmol/L sodium carbonate 1.0mmol/L sodium hydrogen carbonate
- Suppressor: Sequential suppression (MSM: 50 mmol/L H2SO4)
- Flow: 0.7mL/min
- Injection Volume: 100µL.
|Metrosep A Supp 5 - 150/4.0
|Metrosep A Supp 4/5 Guard/4.0
||3.2mmol/L sodium carbonate
1.0mmol/L sodium hydrogen carbonate
||100mmol/L sulfuric acid
||300mg/L hydrogen peroxide
Conductivity after sequential suppression.
|881 Compact IC pro – Anion – MCS
|IC Conductivity Detector
* from local Mitsubishi distributor/not shown in system graphic below.
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