发布时间:2024-05-27 17:49:26 - 更新时间:2024年06月29日 15:22
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1 范围 本文件规定了红茶、绿茶、白茶、乌龙茶中草枯醚、氟除草醚、格螨酯、环螨酯、烯虫炔酯和烯虫乙酯残留量的气相色谱—串联质谱测定方法。 本文件适用于红茶、绿茶、白茶、乌龙茶中草枯醚、氟除草醚、格螨酯、环螨酯、烯虫炔酯和烯虫乙酯残留量的测定,其他茶叶可参照执行。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中,注日期的引用文件,仅该日期对应的版本适用于本文件;不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。 GB/T 6682 分析实验室用水规格和试验方法 GB/T 8303 茶 磨碎试样的制备及其干物质含量测定 3 术语和定义 本文件没有需要界定的术语和定义。 4 原理 试样用乙腈提取,提取液经固相萃取净化,用气相色谱-串联质谱仪检测,内标法或外标法定量。 主要内容目 次 前言 …………………………………………………………………………………………………………Ⅱ 1 范围 ………………………………………………………………………………………………………1 2 规范性引用文件 ………………………………………………………………………………………1 3 术语和定义………………………………………………………………………………………………1 4 原理…………………………………………………………………………………………………………1 5 试剂和材料………………………………………………………………………………………………1 5.1 试剂………………………………………………………………………………………………………1 5.2 溶液配制………………………………………………………………………………………………1 5.3 标准品…………………………………………………………………………………………………1 5.4 标准溶液配制…………………………………………………………………………………………1 5.5 材料………………………………………………………………………………………………………2 6 仪器和设备………………………………………………………………………………………………2 7 试样制备和保存…………………………………………………………………………………………2 7.1 试样制备………………………………………………………………………………………………2 7.2 试样保存………………………………………………………………………………………………2 8 分析步骤…………………………………………………………………………………………………2 8.1 前处理…………………………………………………………………………………………………2 8.2 测定……………………………………………………………………………………………………2 8.3 试样溶液的测定……………………………………………………………………………………3 8.4 平行试验………………………………………………………………………………………………3 8.5 空白试验………………………………………………………………………………………………3 9 结果计算…………………………………………………………………………………………………3 10 精密度和定量限………………………………………………………………………………………4 附录 A(资料性)6种农药和内标化合物的中文名称对照索引……………………………5 附录 B(资料性)6种农药和内标化合物的保留时间、定量离子对、定性离子对………………6 附录 C(资料性)6种农药和内标化合物多反应监测(MRM)色谱图……………………………7 附录 D(资料性)精密度要求 …………………………………………………………………………………8 参考文献…………………………………………………………………………………………………………………9
Determination of pesticide residues of chlornitrofen,fluoronitrofen, 2,4-dichlorophenyl benzenesulfonate, cycloprate, kinoprene and hydroprene in tea by gas chromatography-tandem mass spectrometry
本文件规定了工业用八氟环丁烷的术语和定义、基本要求、技术要求、试验方法、检验规则、标志、包装、运输、贮存、安全和质量承诺。 本文件适用于由二氟一氯甲烷(HCFC-22)裂解生成四氟乙烯、再由四氟乙烯或四氟乙烯与八氟环丁烷共裂解、洗涤、压缩、精馏纯化制备的工业用八氟环丁烷。 化学名称:八氟环丁烷 分子式:C4F8 相对分子质量:200.03(按2018年国际相对原子质量)
Octafluorocyclobutane for industry use
本文件规定了吡唑醚菌酯·氟环唑悬浮剂的技术要求、试验方法、检验规则、验收和质量保证期以及标志、标签、包装、储运。
Pyraclostrobin and epoxiconazole suspension concentrate
本标准规定了电子级八氟环丁烷产品的分类和型号,技术要求,试验方法,检验规则,标志、包装、运输、贮存等。 本标准适用于工业八氟环丁烷通过吸附纯化、精馏提纯生产的电子级八氟环丁烷产品。该产品是电子行业蚀刻气体。
Electronic grade perfluorocyclobutane
本标准规定了工业用八氟环丁烷的要求、试验方法、检验规则以及标志、包装、运输、贮存和安全。 本标准适用于由四氟乙烯及六氟丙烯生产过程中的副产物粗八氟环丁烷经精馏、干燥等过程得到的八氟环丁烷。生产过程中的副产物粗八氟环丁烷经精馏、干燥等过程得到的八氟环丁烷。 分子式:C4F8 分子量:200 CAS号:115-25-3
(a) General. Tolerances are established for residues of the fungicide sedaxane, including its metabolites and degradates, in or on the commodities in the following table. Compliance with the tolerance levels specified in the following table is to be determined by measuring only sedaxane, N-[2-[1,1′-bicyclopropyl]-2-ylphenyl]-3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carboxamide, as the sum of its cisand trans-isomers in or on the commodity.
Protection of Environment. Part180:Tolerances and exemptions for pesticide chemical residues in food. Section180.665:Sedaxane;tolerances for residues.
These o-rings typically have been used as static seals in a variety of fuels, engine oils, hydraulic oils and hydraulic fluids but usage is not limited to such applications. Each application should be considered separately. These o-rings have a typical service temperature range of -65 to +400 °F (-54 to +203 °C).
Packing, Preformed, O-Ring Molded from Perfluoroether, FFO Material
Corrigendum to Commission Directive amending certain Annexes to Council Directives 86/362/EEC, 86/363/EEC and 90/642/EEC as regards maximum residue levels for etoxazole, indoxacarb, mesosulfuron, 1-methylcyclopropene, MCPA and MCPB, tolyfluanid and tritic
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 80
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 70
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 3
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 60
COMMISSION DECISION recognising in principle the completeness of the dossiers submitted for detailed examination in view of the possible inclusion of potassium phosphite, acequinocyl and cyflufenamid in Annex I to Council Directive 91/414/EEC concerning t
COMMISSION DECISION recognising in principle the completeness of the dossiers submitted for detailed examination in view of the possible inclusion of benalaxyl-M, benthiavalicarb, 1-methylclopropene, prothioco-nazole and fluoxastrobin in Annex I to Counci
Screws, Machine, Pan Head, Cross-Recessed, Self-Sealing, Integral Fluorosilicone 0-Ring, Plain and Self-Locking FSC 5305
Screws, Machine, Pan Head, Cross-Recessed, Self-Sealing, Integral Fluorosilicone 0-Ring, Plain and Self-Locking
Aerospace Series O-Rings, in Fluorosilicone Rubber (FVMQ) Technical Specification (Edition P 1)
Aerospace Series O-Rings, in Fluorosilicone Rubber (FVMQ) Hardness 80 IRHD (Edition P 1)
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 80
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 70
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 3
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 60
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 3
RUBBER, FLUOROSILICONE ELASTOMER, OIL- AND FUEL-RESISTANT, O-RINGS, CLASS 1, GRADE 70