How to control the absence of benzene in organic chemicals without a mass spectrometer?
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For example, when detecting organic chemicals such as absolute ethanol and isopropyl alcohol. How do you detect whether it contains benzene and the same when you don’t have a mass spectrometer?
Just use a chromatograph, which may require two different analysis systems. The sensitivity of gas chromatography for detecting benzene and benzene (benzene and benzene) is very high and can reach sub-ppm level.
Agree with the above, the FID response of benzene and Tong is very good, GC+FID is enough. However, you should pay attention to isopropyl alcohol, because its structure is too similar to propyl alcohol, the resolution is not good, and the detection limit will be relatively high.
Our company uses gas chromatograph + FID. But if I make absolute ethanol and there are several impurity peaks in the chromatogram, how can I judge whether those impurity peaks are related to benzene?
Prepare standard samples containing benzene and related substances and compare them with the measured samples. For impurity analysis, it is best to use external standard measurements.