Method for rapidly measuring content of toluene insoluble substances in coal tar

The invention belongs to the technical field of industrial detection, and particularly relates to a method for rapidly determining the content of toluene insoluble substances in medium and low temperature coal tar. The invention discloses a method for detecting the content of toluene insoluble substances in medium and low temperature coal tar, which uses a G4 crucible as a suction filtration device, reduces the dosage of toluene, improves the constant weight accuracy, shortens the constant weight time, greatly shortens the determination time and improves the determination efficiency. Besides, the method for determining the content of the toluene insoluble substances in the coal tar is not only suitable for high-temperature coal tar, but also suitable for medium and low-temperature coal tar with low toluene insoluble substance content, so that the blank that no method for determining the content of the toluene insoluble substances in the medium and low-temperature coal tar exists at present is filled; the meth