German elemental analyzer measures waste oil

In order to protect food safety and safeguard the rights and interests of consumers, it is extremely urgent to explore a reasonable and effective method for identifying waste oil. In this article, the German Jena multiana element analyzer multiEA5000 was used to determine the total chlorine content in the oil sample. The total chlorine content in the waste oil will be much higher than that of normal oil. The identification of conventional oils and waste oils can be easily and conveniently achieved through the total chlorine content of the sample.

Sample Preparation:

All samples were diluted with isooctane in a 1:1 ratio prior to assay.

Sample measurement:

The sample to be tested is analyzed and determined in a multi-element analyzer multiEA5000 horizontal furnace mode. In the post-combustion process, the sample is decomposed at a temperature of 1050°C. This procedure ensures the full combustion and degradation of the sample. Sample by driving the boat autosampler is pushed into the combustion furnace, Jena unique flame sensing technology, both for any type of sample, can be real-time monitoring and optimization of the entire combustion process, will not be guaranteed throughout the reaction combustion Excessive deflagration or incomplete combustion produces carbon deposits. The total chlorine content in the sample was determined by microcoulometry and the sample was injected using the multifunctional autosampler MMS5000.

standard curve line:

In order to detect the total chlorine content in the sample, the isocratic alkyl 2,4,6-trichlorophenol was used as the standard solution to plot the marked curve.

Results and discussion:

The following figure shows the total chlorine content of the sample to be tested. Each sample is measured in parallel 3-5 times. The software automatically selects the number of determinations based on the RSD value.

The results of total chlorine in the EA determination samples are as follows (where 6 and 9 are conventional oil samples, and the other four samples are waste oil samples):

Evident by comparing the above table, the total chlorine content of waste oil sample in the sample higher than a conventional oil 1.3-2.4 orders of magnitude, the total chlorine test sample can be very easily conventional waste oil and oil-like sample identified.

multiEA5000 set in a plurality of modules can be used to detect solids, liquids, gases and objects viscous sulfur, nitrogen, carbon, chlorine content, because of its innovative technology, multiEA5000 apparatus has a wide range of applications, and it has With strong applicability and flexibility, it is an efficient inspection tool for various industries.