Method for detecting trace-amount titanium dioxide content in nylon 66

The present invention discloses a method for detecting trace-amount titanium dioxide in nylon 66, the method is as follows: a titanium dioxide standard solution is prepared, absorbance is tested by an ultraviolet spectrophotometer, and a working curve is drawn; the nylon 66 is digested, a nylon 66 to-be-tested solution is prepared, the absorbance of the to-be-tested solution is tested by the ultraviolet spectrophotometer, and the titanium dioxide content in the nylon 66 can be detected by the drawn working curve. The method is simple in operation, high in efficiency and low in cost, greatly reduces the time to detect the trace-amount titanium dioxide, helps to adjust a nylon 66 production process, and can effectively improve product quality.