Detection Target
Determination of Trace Elements in Middle Distillate Fuels
Overview
This solution conforms to the ASTM D7111 Standard Test Method for Determination of Trace Elements in Middle Distillate Fuels by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). HKL-7111 inductively coupled plasma atomic emission spectrometry (ICP-AES) covers the determination of selected elements in middle distillate fuels. The concentration range of this test is approximately 0.1 to 2.0 mg/kg. The test may be used for concentrations outside of this range; however, the precision statements may not be applicable. Middle distillate fuels covered in this test method have all distillation fractions contained within the boiling range of 150 to 390°C. This includes, but is not limited to, diesel fuels and aviation turbine fuels.
Instrument advantage
1. There are more than 70 kinds of elements can be tested.
2. Simultaneous testing of multiple elements, all elements are tested at the same time with one sample injection.
3. Fast analysis speed, about 5 elements per minute, and the fastest test speed can reach 10 elements per minute.
4. The detection limit is low, and most elements can reach ppb level.
5. The linear range is wide, up to 5-6 orders of magnitude, and high and low content can be tested at the same time without changing the standard curve.
6. Less chemical interference and more accurate test results.
Features
1. Safe and Reliable Solid-state RF Power Supply: The radio frequency power supply implemented in this instrument has the advantages of a compact size, high output efficiency, and stable output power. Besides, it has several safety protection functions such as water circuit, air circuit, and overload which significantly increase the safety level of the instrument and reduce its failure rate.
2. High degree of automation: The instrument is capable of a very high level of automation. Except for the main power switch, everything else is controlled by software. Intelligent software can offer live feedback and information prompts for different operations instantly.
3. Automatic ignition: Software has the ability to fully automate one-key ignition so that all parameter setting changes will be done automatically. The use of advanced automatic matching technology leads to a high ignition success rate and the operation is simple.
4. High-precision airflow control system: Plasma gas, helper gas, and carrier gas in the instrument are regulated by a mass flow controller (MFC) with a high-precision. Flow rate can be adjusted continuously and the output air flow is very accurate, which makes test data accurate.
Technical Parameters
Table1. Main Technical Parameters of HKL-7111 | |
High Frequency Generator | |
Working Frequency | 27.12MHz |
Stability | ﹤0.05％ |
Output power | 800W～1600W |
Stability | ≤0.05％ |
Matching Method | Automatic |
Scanning spectrometer | |
Light path | Czerny turner |
Focal length | 1000mm |
Raster specification | Ion-etched holographic grating, engraved line density 2400L / mm; scribed area (80 × 110) mm |
Line dispersion reciprocal | 0.26nm/m |
Resolution | ≤0.008nm(3600 wire grating） |
≤0.015nm(2400 wire grating) | |
Main host Parameters | |
Scanning wavelength range | 195nm～500nm（3600L/mm wire grating） |
195nm～800nm（2400L/mm wire grating） | |
Repeatability | RSD≤1.5％ |
Stability | RSD≤2.0％ |
Sample measurable element evaluation
Now for the detection of middle distillate fuel, the application Research and Development center has evaluated the details as shown in Table 2:
Table 2. Middle distillate fuel sample solutions | ||||
Samples | Tested elements | Instrument | sample processing (for reference only) | Standard |
Middle Distillate Fuels | shown ASTM D7111 table 1 | HKL-7111 ICP | Weigh 0.5g of sample into a microwave digestion tank, add 6ml nitric acid and 2ml hydrogen peroxide, preheat it on a 150 °C electric hot plate for about 10 minutes, cool it, and load it into the microwave digestion to run the program. After completion, cool to room temperature and make the volume constant. To 50ml to be tested | ASTM D7111 |