Bismuth film electrode (BiFE) of less environmentally concern was developed to determine blood lead by differential pulse - anodic stripping voltammetry (DP-ASV). The lead determination gained high precision (RSD ). The ASV using BiFE prepared in situ were applied for determination of blood lead and 24-hour urine lead of suspected and control groups of the residents at Canh Duong village, Thua Thien Hue province.