The InfraCal Model ATR-SP is ideal for quantifying oil in water, total petroleum hydrocarbons (TPH) in soil, and fats, oils, and grease (FOG) in wastewater.
This analyzer is designed for use with hexane, pentane, or Vertrel MCA as the extraction solvents. It produces measurement results that comply with EPA Method 1664, using comparable evaporation techniques to assess the content of residual oil and grease.
The device features a robust, built-in cubic zirconia horizontal attenuated total reflection (HATR) stainless steel sample stage. The InfraCal 2 ATR-SP serves as a direct replacement for the widely-used original InfraCal HATR-T2, which is employed globally for assessing TOG/TPH in water and soil.
- Minimum Detection Limit Soil: 3 ppm
- Minimum Detection Limit Water: 0.3 ppm
- Method Comparison: ISO 9377-2 & EPA 1164
- Solvents: Vertrel MCA, cyclohexane, pentane, and hexane
InfraCal 2 Oil in Water Analyzer
Video Credit: AMETEK Spectro Scientific
Highlights
As offshore oil wells age, they produce more water, posing challenges for wastewater treatment systems. Regular testing is crucial to ensure that oil levels in the water remain below regulatory limits.
Infrared analysis has been a reliable method for measuring oil in offshore water for over 45 years. It is an accepted technique for oil content measurement because it is minimally affected by variations in the composition of produced water.
For industrial pretreatment of wastewater and public water treatment plants, adopting a simplified procedure for monitoring FOG discharges can prevent fines, avoid sanitary sewer overflows (SSOs), and provide on-site results in less than 15 minutes. This approach is a practical alternative to waiting days or weeks for results from an off-site laboratory.
The InfraCal 2 has been enhanced with features including a multilingual interface, data storage and transfer capabilities, a touchscreen display, and password-protected settings. An internal battery pack allows for up to six hours of continuous use, enhancing its portability.
Operating Principle
The InfraCal 2 ATR-SP analyzer is engineered to measure solvent extractable materials (such as oil and grease) in water or soil by infrared determination. It utilizes hexane, pentane, cyclohexane, or Vertrel MCA for the extraction process.
This analyzer features a detector with a fixed 3.4 μm (2940 cm-1) filter specifically for measuring oil and grease concentrations. It aligns with several EPA methods, including 1664, as well as ASTM D7066 and EPA 413.1 and 418.1, ensuring broad compliance and applicability.
The ATR-SP capitalizes on the principle that oil and grease can be efficiently extracted from water or soil using an appropriate solvent and procedure. The extracted hydrocarbons absorb infrared energy at a specific wavelength, and the amount of energy absorbed directly correlates with the hydrocarbon concentration in the solvent. The analyzer is adaptable and capable of being calibrated to display readings in various units, including %, ppm, mg/L, or mg/kg.
The touchscreen display enhances user interaction with features like multiple calibration options, a calibration wizard guide, a multilevel user database, and options for multiple languages according to user preference. It also includes functionality for setting high/low alarms and control limits, and it stores measurement data in a history table for easy recall or export via flash drive or serial port.
Image Credit: AMETEK Spectro Scientific
Specifications
Source: AMETEK Spectro Scientific
| Item |
Specifications |
| Analytical Wavelength/Wave Number |
3.4 µm, 2930 cm-1 |
| Power Requirements |
18 volts DC, 3.3 amps, internal battery pack available |
| Power Supply |
Universal AC/DC provided |
| Weight |
5.8 lb. (2.6 kg) with battery -7.0 lbs (3.2 kg) |
| Dimensions |
(17 cm) x 7.8" (19.8 cm) x 5.2" (13.2 cm) |
| Suggested Operating Range |
5 °C - 40 °C |
| Measurement Range |
|
| For Water |
0.3-2000+ ppm
0.3-15+% |
| For Soil |
3-2000+ ppm
0.3-15+% |
| Analysis Time |
10-15 minutes, including extraction process |
| Instrument Repeatability |
±0.3 ppm |
| Communication Port |
USB |
New High-Range Measurement of Oil in Water or Soil
The InfraCal 2 analyzer, equipped with an ATR (Attenuated Total Reflection) sample stage, can now measure oil concentrations in the range of 0.5-10 % in water or soil. This is achieved using a solvent that does not absorb infrared at the hydrocarbon wavelength, thus eliminating the need for evaporation.
By measuring the extract directly in the solvent, the analyzer facilitates percent range measurements with the same ATR sample stage typically used for ppm (parts per million) levels.
- Measurement Range Water: 0.5 – 10 %
- Measurement Range Soil: 0.5 – 10 %
- Solvents: S-316, Tetrachloroethylene