As a key analytical tool in environmental monitoring and industrial testing, oil meters are widely used for quantitative detection of oil in water, soil, air and industrial emissions.However, there has always been discussion and controversy as to whether or not oil meters must rely on extraction as a step.In this paper, we will answer this question from the technical principles, application status and future trends of science and technology.
Extraction is a crucial step in conventional oil detection methods.Extraction extracts the oil from the sample through specific organic solvents (e.g., hexane, carbon tetrachloride, etc.), then removes impurities through subsequent steps (e.g., dehydration, adsorption, etc.), and ultimately detects them using an oil meter (e.g., infrared spectrophotometer, ultraviolet spectrophotometer).This method, although complex and costly, is effective in improving the accuracy and stability of the test.
With the progress of science and technology, in recent years, there is an oil measurement technology without the need for an extraction step - direct injection infrared spectrophotometric oil measurement.This method, through improved cuvette design and instrument design, allows the sample to be placed directly in the oil meter for detection without the need for complex extraction processes.The emergence of this technology not only simplifies the operation process and reduces the cost, but also reduces the environmental pollution that may be brought about by the extraction process.
Advantage:
1、Simplify the process: eliminating the tedious steps of extraction, dehydration, adsorption, etc., significantly shortening the detection time.
2、 reduce costs: reduce the use of organic solvents and other consumables, reducing the cost of the experiment.
3、 reduce pollution: avoid the extraction process of organic solvents on the environment.
4、 improve efficiency: direct injection detection to improve the detection efficiency, suitable for rapid screening of large quantities of samples.
Challenge:
1、 detection accuracy: for high viscosity or high content of oil samples, direct injection may lead to interference with the detection results, affecting the accuracy.
2、the technical threshold: direct injection infrared spectrophotometric oil method requires high precision and stability of the instrument, requiring a high level of technology and maintenance costs.
Despite the convenience of extraction-free oil testing, extraction is still an essential step in certain scenarios.For example, when testing samples with high concentrations, high viscosities or complex matrices, extraction can effectively improve the accuracy and reliability of the test.In addition, the application of fully automated extractors further enhances extraction efficiency and safety, and reduces errors caused by human factors.
Therefore, whether or not the oil meter requires extraction depends on the specific testing needs and sample characteristics.In the pursuit of high efficiency, environmental protection and cost control, oil measurement technology without extraction undoubtedly provides new possibilities for oil detection.However, extraction is still an important means of ensuring the accuracy and reliability of detection in specific scenarios. ERUN-SP3-J4 portable infrared spectrophotometer portable integrated design, universal wheel waterproof case is convenient to carry,Designed with one-stop sample pretreatment portable workstation, on-site sampling, automatic extraction of water samples, fast and convenient, especially for emergency monitoring and routine field inspection monitoring, can also be used as a laboratory routine analysis.
