Detection Target
Determination of Trace Ethylene Glycol in Used Engine Oil
Overview
This solution conforms to ASTM D4291 Standard Test Method for Trace Ethylene Glycol in Used Engine Oil. It is used for the measurement of ethylene glycol as a contaminant in used engine oil. The ethylene glycol is supposed to be in the range from 5 to 200 mass ppm.
Introduction
The sample of oil is extracted with water and the analysis is performed on the water extract. A reproducible volume of the extract is injected into a gas chromatograph using on-column injection and the eluting compounds are detected by a flame ionization detector. The ethylene glycol peak area is determined and compared with areas obtained from the injection of freshly prepared known standards.
Leakage of aqueous engine coolant into the crank case weakens the ability of the oil to lubricate. If ethylene glycol is present, it promotes varnish and deposit formation. This test method is designed for early detection to prevent coolant from accumulating and seriously damaging the engine.
Apparatus
HKL-4291 GC for Trace Ethylene Glycol in Used Engine Oil
Standard Calibration
Prepare glycol standards over the quantification range of 0.01% to 0.2% w/w in motor oil
Temperature information
Temperature range: Ambient+5℃~ 400℃, Increment: 0.1℃
Accuracy: ≤±0.1℃
Programmed heating: Constant temperature time between five steps 0~999min, increment: 0.1min, temperature increment: 0.1℃
Heating rate: max. 40℃/min below 200℃ , max. 20℃/min above 200℃
Specification
Dimension: 555mm*525mm*485mm
Input power: AC220V±7%, 50Hz, 2Kw
Net weight: About 52kg
Chromatogram
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Chromatogram shows elution of ethylene glycol | Calibration curve of ethylene glycol |
Configuration
No. | Name | Specification | Quantity |
1 |
GC for transformer oil
| 1. Big LCD screen display. power on self test, wide range self test, intelligent fuzzy control back door system, over temperature protection (shut down the power). Five steps temperature programming 2. Configuration: Main host + FID + column injection port | 1 set |
2 | Work station | Data collection | 1 set |
3 | Dedicated column | Specification: 15m*0.32mm*0.25μm Brand: Agilent | 1 piece |
4 | Air generator | 1. Air purity: Grade 3 without oil 2. Output flow rate: 0-3L/min 3. Output pressure: 0-0.4MPa（Adjustable） 4. Rated power: 150W | 1 set |
5 | Hydrogen generator | 1. Hydrogen purity: 99.999 2. Output flow rate: 0-300/min 3. Input pressure: 0-0.4MPa 4. Rated power: < 150W | 1 set |
6 | Gas purifier | Switching valve controlled，easy operation. Deep purification to harmful gases, providing a high-quality gas source for GC | 1 set |
7 | High purity nitrogen | Nitrogen purity: 99.999% Steel cylinder+ reduced valve | Self prepare |
8 | PC | General configuration |