title: [Analysis of pesticides including chlorine in welsh onions and mushrooms using gas chromatograph with an atomic emission detector (GC-AED)].
abstract: An analytical method for the determination of 32 kinds of pesticide residues in onions, Welsh onions and mushrooms using gas chromatograph with an atomic emission detector (GC-AED) was developed. The pesticides were extracted with acetone-n-hexane (2:3) mixture. The crude extract was partitioned between 5% sodium chloride and ethyl acetate-n-hexane (1:4) mixture. The extract was passed through a Florisil mini-column for cleanup with 10 mL of acetone-n-hexane (1:9) mixture. Although the sensitivity of GC-AED was inferior to that of GC-ECD, GC-AED has a superior element-selectivity. Therefore pesticide residues in foods could be analyzed more exactly by using GC-AED. Thirty-two pesticides including chlorine in onion, Welsh onion and shiitake mushroom were detected without interference. Recoveries of these pesticides from samples determined by GC-AED were 64-114%, except for a few pesticides.
authors.affiliation: Tokyo Metropolitan Institute of Public Health, Tokyo, Japan.
authors.forename: Yukinari
authors.initials: Y
authors.lastname: Tateishi
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takano
authors.forename: Maki
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tamura
authors.forename: Sanae
authors.initials: S
authors.lastname: Tomizawa
authors.forename: Naoko
authors.initials: N
authors.lastname: Sakai
authors.forename: Kyoko
authors.initials: K
authors.lastname: Kamijo
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nagayama
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Kamata
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D005504:Food Analysis / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D019697:Onions / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D020942:Shiitake Mushrooms / Q000737:chemistry*; D013054:Spectrophotometry, Atomic / Q000295:instrumentation*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010573:Pesticide Residues