title: Determination of zinc and copper in edible plants by nanometer silica coated, slotted quartz tube, flame atomic absorption spectrometry.
abstract: Nanometer SiO(2) was coated onto the inner wall of a slotted quartz tube atomizer (STAT) and then was used as a new atomizer (NSC- STAT) for the determination of Zn and Cu by flame atomic absorption spectrometry (FAAS). Compared to conventional STAT-FAAS, the analytical performance of NSC-STAT-FAAS was improved as follows: (a) the linear range of calibration curves was expanded from 30.0-200.0 ng mL(-1) to 5.0-400.0 ng mL(-1) for Zn, and from 100.0-1000.0 ng mL(-1) to 50.0-2000.0 ng mL(-1) for Cu; and (b) the characteristic concentration was decreased from 6.0 ng mL(-1)/1% to 2.7 ng mL(-1)/1% for Zn and from 25.0 ng mL(-1)/1% to 10.1 ng mL(-1)/1% for Cu. NSC-STAT-FAAS was applied for the determination of Zn and Cu in edible plants, including herbal medicine, marine algae, tomato leaves (NIST 1573), and apple leaves (NIST 1515).
authors.affiliation: Department of Chemistry, Zhangzhou Normal University, Zhangzhou, China 363000. lishunxing@fjzs.edu.cn
authors.forename: Shun-Xing
authors.initials: SX
authors.lastname: Li
authors.forename: Feng-Ying
authors.initials: FY
authors.lastname: Zheng
authors.forename: Yan-Cai
authors.initials: YC
authors.lastname: Li
authors.forename: Tian-Shou
authors.initials: TS
authors.lastname: Cai
authors.forename: Jian-Zhong
authors.initials: JZ
authors.lastname: Zheng
mesh_terms: D003300:Copper / Q000032:analysis*; D018551:Solanum lycopersicum / Q000737:chemistry; D027845:Malus / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010945:Plants, Edible; D010946:Plants, Medicinal / Q000737:chemistry; D011791:Quartz; D012822:Silicon Dioxide; D013054:Spectrophotometry, Atomic / Q000295:instrumentation / Q000379:methods*; D015032:Zinc / Q000032:analysis*
chemical_list: D011791:Quartz; D012822:Silicon Dioxide; D003300:Copper; D015032:Zinc