An ultrasound bath extraction technique was applied in the modified BCR sequential extraction method for lead speciation in sediments. The extraction time of the modified BCR was optimized and the time consumed for all three stages was dramatically shortened compared with the conventional BCR. Contents of extractable metals obtained by both the conventional and the modified methods were measured by hydride-generation Atomic Fluorescence Spectrometry. The results of each fraction obtained by both methods were statistically compared. With a much shorter operating time, the proposed modified BCR sequential extraction method could serve as a valid alternative to the conventional shaking.