Consistent compliant analysis of Aromatic Hydrocarbons & their mixture samples from customers across the MENA region using Combustion Ion Chromatography (CIC).
Halogen and sulfur content in aromatic hydrocarbons and liquid organics can be determined using CIC, as outlined in ASTM D7359/UOP 991. Measuring these contaminants is critical, as high levels of halogens and sulfur can cause environmental pollution, catalyst poisoning, and corrosion.
Metrohm offers a comprehensive CIC solution featuring full system control utilizing MagIC Net software, i.e., both IC and Combustion modules will be controlled via a single software.
Optimized combustion for each sample eliminates the need to develop a specific combustion approach for different sample types or matrices. An inbuilt flame sensor is used to automate the boat movement, ensuring complete combustion of the sample.
This process prevents smooth formation and contamination of the combustion tube, enhancing the system's reliability and cleanliness. This approach significantly improves throughput, precision, and accuracy, making the process more efficient and reducing the potential for errors or delays during analysis.
Chromatogram 1. The treated naphtha sample was injected directly into CIC for Chlorine & Sulphur determination without sample preparation. Image Credit: Metrohm Middle East FZC
Table 1. Results for treated naphtha sample. Source: Metrohm Middle East FZC
| Sample |
Average |
n |
| Chloride (mg/Kg) |
0.504 ± 0.008 |
3 |
| Sulphur (mg/Kg) |
12.55 ± 0.058 |
3 |
Chromatogram 2. The nontreated naphtha sample was injected directly into CIC for Chlorine and Sulphur determination without sample preparation. Image Credit: Metrohm Middle East FZC
Table 2. Results for non-treated naphtha sample. Source: Metrohm Middle East FZC
| Sample |
Average |
n |
| Chloride (mg/Kg) |
0.551 ± 0.005 |
3 |
| Sulphur (mg/Kg) |
426.76 ± 1.503 |
3 |
Chromatogram 3. Fuel oil sample 10 times diluted with toluene was injected into CIC for Chloride determination. Image Credit: Metrohm Middle East FZC
Chromatogram 4. Fuel oil sample 200 times diluted with toluene was injected into CIC for Sulphur determination. Image Credit: Metrohm Middle East FZC
Table 3. Results for Chloride & Sulphur determination Source: Metrohm Middle East FZC
| Sample |
Average |
n |
| Chloride (mg/Kg) |
7.79 ± 0.13 |
3 |
| Sulphur (%) |
4.49 ± 0.025 |
3 |
Table 4. Columns. Source: Metrohm Middle East FZC
| |
|
| Metrosep A Supp 5 - 150/4.0 |
6.1006.520 |
| Metrosep A Supp 5 Guard/4.0 |
6.1006.500 |
| Metrosep A PCC 2 HC/4.0 |
6.1006.340 |
Table 5. Solutions. Source: Metrohm Middle East FZC
| |
|
| Eluent |
c(Na2CO3) = 3.2 mmol/L |
| c(NaHCO3) = 1.0 mmol/L |
| Regenerant |
c(H2SO4) = 0.1 mol/L |
| Rinsing solution |
STREAM |
| Absorber solution |
100 mg/L Hydrogen peroxide |
Table 6. Analysis. Source: Metrohm Middle East FZC
| |
| Conductivity after sequential suppression |
Table 7. Parameters. Source: Metrohm Middle East FZC
| |
|
| Flow rate |
0.7 mL/min |
| Injection volume (IC) |
200 μL (MiPT) |
| Recording time |
20 min |
| Column temperature |
30 °C |
Table 8. Combustion system parameters. Source: Metrohm Middle East FZC
| |
|
| Argon |
100 mL/min |
| Oxygen |
300 mL/min |
| Oven temperature |
1050 °C |
| Post-combustion time |
120 sec |
| Initial volume of absorption solution |
2 mL |
| Water addition |
0.1 mL/min |
| Absorption solution addition |
0.2 mL/min |
| Total Makeup volume |
7 mL |
| Combustion volume |
100 μL |
| Injection volume |
100 μL |
| Post rinse PCC Volume |
2 mL |
Table 9. Instrumentation. Source: Metrohm Middle East FZC
| |
|
| 2.930.2560 |
930 Compact IC Flex Oven/SeS/PP/Deg |
| 2.850.9010 |
IC conductivity detector |
| 2.136.0700 |
Combustion Module |
| 2.136.0800 |
Autosampler MMS 5000 |
| 6.7303.000 |
Liquid sampling Kit |
| 2.920.0010 |
920 Absorber Module |
| 6.7302.100 |
Quartz boat 40 x 9 mm (AJ) |
| 6.7301.150 |
Quartz substrate for liquid samples |
Image Credit: Metrohm Middle East FZC
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This information has been sourced, reviewed and adapted from materials provided by Metrohm Middle East FZC.
For more information on this source, please visit Metrohm Middle East FZC.