U pipe acceptor used for determining benzene content of oil substance

The utility model relates to a device for determination of benzene content, in particular to a U-tube acceptor for detecting benzene content in oily substances. The technical scheme is that a liquid inlet groove (1) is connected with one end of the u-tube (2) the other end of which is provided with a liquid outlet equipped with an overflowing slot (3). The U-tube is provided with calibrations. By using the utility model and because of the overflowing slot, the distillate in the U-tube acceptor can only first naturally comes into the overflowing slot, and then flows out drop by drop without carrying off all or part of the distillate in the U-tube acceptor, and at the same time the siphon phenomenon is avoided, ensuring the accuracy of analytical experiment. The utility model is reliable in structure, convenient in use and can ensure the accuracy of analytical experiment, avoiding test failure and improving work efficiency.