Portable Infrared Spectroscopic Oil Analyzer HM-CY2

The analysis method of this product complies with the latest national method standards:

HJ637-2018 Water quality - Determination of petroleum and animal and vegetable oils - Infrared spectrophotometric method "" HJ1051-2019 Soil - Determination of petroleum - Infrared spectrophotometric method "

HJ1077-2019 Determination of fixed source exhaust gas, oil fume and oil mist by infrared spectrophotometry

Overview

1.1 Industry Introduction

Oil substances are viscous liquids that are difficult to dissolve in water and selectively dissolve in organic solvents. Their relative density is generally less than 1, and they are divided into petroleum and animal and plant oils. Petroleum is a complex mixture composed of many hydrocarbons of different molecular sizes, containing small amounts of organic compounds such as sulfur, nitrogen, and oxygen. The composition of petroleum varies from place to place, and there is no definite chemical composition and physical constant. Carbon and hydrogen have an absolute advantage, with a total amount of 95% to 99%, mainly existing in the form of hydrocarbons, and are the main components of petroleum. Hydrocarbons are composed of alkanes, cycloalkanes, and aromatic hydrocarbons. The oxygen, sulfur, and nitrogen content accounts for 1% to 4%, mainly existing in the form of compounds. Compounds containing sulfur, nitrogen, and oxygen are mostly enriched in residual oil, resin, and asphalt.

Oils are various hydrocarbons composed of CH, CH2, and CH3, which are inherent characteristics of various oils. Various compounds composed of CH, CH2, CH3 represent the overall oil. Due to the use of tetrachloroethylene instead of carbon tetrachloride, some definitions need to be changed to: "After deducting the infrared background absorption value of tetrachloroethylene, substances that can be dissolved by tetrachloroethylene and have characteristic absorption at wave numbers (3030cm-1, 2930cm-1, 2960cm-1) are called oil.

The wavenumbers (3030cm-1, 2930cm-1, 2960cm-1) represent the infrared characteristic absorption of CH, CH2, and CH3, respectively. CH, CH2, and CH3 are inherent features in various oil products worldwide. As long as the bond energy (absorbance) of CH, CH2, and CH3 in the sample can be measured, the oil content in the oil can be determined. The infrared spectrophotometer relies on the characteristics of oil to detect its absorbance at three wave numbers (3030cm-1, 2930cm-1, 2960-1) for quantitative analysis.

1.2 Main purpose

Can be used for emission detection of mineral oil and animal and vegetable oil in surface water, groundwater, domestic sewage, industrial wastewater, soil, as well as oil fume and oil mist in exhaust gas;

Applicable to: environmental monitoring stations, hydrological stations, petrochemical, machinery, automobile and aircraft manufacturing and other enterprises and institutions. Industries such as pharmaceuticals, agricultural technology, and ocean transportation.

Instrument performance and operating parameters

2.1 Basic working principle

The composition of petroleum substances is very complex and varies depending on the place of origin. The main components of petroleum are hydrocarbons (alkanes, cycloalkanes, and aromatic hydrocarbons). In infrared absorption spectroscopy, due to the varying ratios of methylene CH2 groups, methyl CH3 groups, and Ar-H aromatic hydrocarbons in petroleum substances from different origins, their respective correction coefficients are calculated: X is the coefficient of methylene CH2 groups, Y is the coefficient of methyl CH3 groups, Z is the coefficient of Ar-H aromatic hydrocarbons, and then the ratio of the wavenumber of methylene CH2 at 2930cm-1 to 3030cm-1 is calculated as F. After obtaining the values of F, X, Y, and Z, various petroleum substances are measured to achieve the goal of determining petroleum substances without being affected by changes in petroleum origins.

Qualitative analysis: When a certain frequency of infrared radiation passes through a molecule, if the vibration frequency of a bond in the molecule is the same as it, the bond absorbs infrared radiation and increases energy, and the vibration will be strengthened; If there are no bonds of the same frequency in the molecule, infrared radiation will not be absorbed. If the frequency of infrared radiation is continuously changed to irradiate the sample, the infrared radiation passing through the sample absorption cell will be stronger in some areas and weaker in others, resulting in infrared absorption spectra.

Quantitative analysis: When light of a certain wavelength passes through the measured solution, its energy is absorbed. The intensity of light absorption is proportional to the concentration of the substance being measured

2.2 Performance indicators

The detection limit of the instrument is DL ≤ 0.04mg/L (3 times SD of 11 measurements of tetrachloroethylene blank solution)

The detection limit of the method is 0.06mg/L; When the sample volume is 500ml and the extraction solution volume is 50ml (HJ637-2018 standard)

Minimum detectable concentration 0.003mg/L

Sample measurement range 0-100% oil (enrichment and dilution)

Basic measurement range: 0.0-800mg/L

Repeatability RSD ≤ 0.6% (11 measurements of 30-80mg/L oil sample)

Accuracy error ≤ 2%

Correlation coefficient r>0.999

Scanning speed full spectrum scanning, fast mode 45 seconds/time, precision mode 3 minutes/time

Wave number range 3100cm-1 to 2800cm-1 (i.e. 3200nm to 3570nm)

The absorbance range is 0.0000-2.0000 AU (i.e. transmittance of 100-1% T)

Spectral accuracy 2nm

Temperature and humidity range: 1 ℃ -40 ℃, humidity ≤ 90%

Host size 500mm × 350mm × 200m (length, width, height)

Use a power supply of 100-240V, (50 ± 1) Hz, 50VA

2.3 Instrument Features

1) This product adopts the calibration coefficient method specified in the national standard for testing principles, strictly following the national standard formula, using 20mg/L n-hexadecane, 20mg/L isooctane, 100mg/L benzene for calibration, and finally inputting the calibration formula to calculate the instrument calibration coefficient for measuring samples (standard curve method can also be used for testing);

2) Using the mainstream Android 7.1 system and 8-inch color large screen mode for instrument operation, all instrument operations can be performed through touch screen, which is convenient and fast, and easy to get started like operating a mobile phone;

3) Built in wireless network function, can be connected to external WIFI to achieve network upload function;

4) Internal 16GB storage capacity, capable of storing over 100W pieces of data, and can export data directly via USB through a USB flash drive;

5) Automatic synchronization of network time avoids inaccurate local time caused by prolonged use of instruments, which affects the accuracy of output voucher time;

6) Powerful background data support, after the user has tested the sample, not only can the results be printed and saved locally through the printer, but also can be uploaded to the cloud platform database through WIFI or 4G connection to the Internet;

7) Not only does it have basic functions such as detection function settings, curve analysis, and historical data, but it can also zoom in and out of spectra, allowing users to infinitely refine spectra and observe curves at low concentrations more clearly;

8) High automation program application, users can perform individual testing of all instrument functions, wavelength automatic scanning, automatic correction and other functions through the Android system, making data detection more accurate;

9) One click program upgrade function, no need for engineers to download on site, can upgrade the APP program by inserting a USB flash drive;

10) The use of electrically modulated light sources not only reduces the heat generation intensity of the light source to facilitate system heat dissipation, but also simplifies the instrument structure and improves instrument reliability by reducing mechanical cutting motion components;

11) Real time automatic zero adjustment, the instrument collects both the signal when the light source emits light and the signal when the light source goes off, achieving real-time automatic zero adjustment, simplifying operation and improving long-term signal stability;

12) The detachable integrated optical system makes the instrument small in size, short in optical path length, and high in energy. The optical path meets the requirements of infrared spectroscopy, with good stability and high signal-to-noise ratio;

Shipping accessories

Name Parameter Unit Quantity

Color dish 4CM oil analyzer special box 1

Standard Material Tetrachloroethylene Petroleum 1000ug/ml Bottle 2

Manual copy 1

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