title: Effects of different cleaning treatments on heavy metal removal of Panax notoginseng (Burk) F. H. Chen.
abstract: The quality and safety of Panax notoginseng products has become a focus of concern in recent years. Contamination with heavy metals is one of the important factors as to P. notoginseng safety. Cleaning treatments can remove dust, soil, impurities or even heavy metals and pesticide residues on agricultural products. But effects of cleaning treatments on the heavy metal content of P. notoginseng roots have still not been studied. In order to elucidate this issue, the effects of five different cleaning treatments (CK, no treatment; T1, warm water (50°C) washing; T2, tap water (10°C) washing; T3, drying followed by polishing; and T4, drying followed by tap water (10°C) washing) on P. notoginseng roots' heavy metal (Cu, Pb, Cd, As and Hg) contents were studied. The results showed that heavy metal (all five) content in the three parts all followed the order of hair root > rhizome > root tuber under the same treatment. Heavy metal removals were in the order of Hg > As > Pb > Cu > Cd. Removal efficiencies of the four treatments were in the order of T2 > T1 > T3 > T4. Treatments (T1-T4) could decrease the contents of heavy metal in P. notoginseng root significantly. Compared with the requirements of WM/T2-2004, P. notoginseng roots' heavy metal contents of Cu, Pb, As and Hg were safe under treatments T1 and T2. In conclusion, the cleaning process after production was necessary and could reduce the content of heavy metals significantly. Fresh P. notoginseng root washed with warm water (T2) was the most efficient treatment to remove heavy metal and should be applied in production.
authors.affiliation: a Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming , Yunnan , China.
authors.forename: Liu
authors.initials: L
authors.lastname: Dahui
authors.forename: Xu
authors.initials: X
authors.lastname: Na
authors.forename: Wang
authors.initials: W
authors.lastname: Li
authors.forename: Cui
authors.initials: C
authors.lastname: Xiuming
authors.forename: Guo
authors.initials: G
authors.lastname: Lanping
authors.forename: Zhang
authors.initials: Z
authors.lastname: Zhihui
authors.forename: Wang
authors.initials: W
authors.lastname: Jiajin
authors.forename: Yang
authors.initials: Y
authors.lastname: Ye
mesh_terms: D065966:Absorption, Physicochemical; D065567:Absorption, Physiological; D000327:Adsorption; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002681:China; D004340:Drug Contamination / Q000517:prevention & control*; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D053723:Panax notoginseng / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D018517:Plant Roots / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D035281:Plant Tubers / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D027343:Rhizome / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D012995:Solubility; D013054:Spectrophotometry, Atomic
chemical_list: D004365:Drugs, Chinese Herbal; D019216:Metals, Heavy; C519374:Panax notoginseng extract; D012987:Soil; D012989:Soil Pollutants
keywords: Chinese herb medical; Panax notoginseng (Burk) F. H. Chen; cleaning treatments; heavy metal