Phân tích đánh giá hàm lượng chì và Asen trong một số loại rau trồng ở huyện Bố Trạch, tỉnh Quảng Bình

The contents of Pb and As found in 32 samples of vegetables (16 samples of water morning glory (rau muong) and 16 samples of colza (rau cai) in Dong Trach commune, Bo Trach district, Quang Binh province was analyzed and estimated. The results show that the GF-AAS method for detemining Pb and As has a low limit of detection (LOD), a low limit of quality (LOQ), good accuracy and repetonce. The contents of Pb and As found in water morning glory (rau muong) were higher than in colza (rau cai). The contents of these metals were estimated versus time and sample taking sites. The data were compared with Vietnamese standards.