a joint decision-making scheme for groups with members having different superiorities

公平性、透明性是联合决策的基本安全需求.结合多机构商务合作背景,利用具有同态性质的Paillier公钥密码系统和门限密码技术,提出了面向有差异群体的联合决策策略与方案,并对其安全性进行了分析和证明

Determination of 33 Pesticide Residues in Honeysuckle by Gel Permeation Chromatography Purification and Gas Chromatography-Mass Spectrometry

建立了凝胶渗透色谱(gPC)净化、气相色谱-质谱(gC-MS)同时测定金银花中33种有机氯、有机磷和拟除虫菊酯农药残留的方法。样品中的待测农药组分经乙酸乙酯-环己烷混合溶剂(1∶1,V/V)提取、gPC净化去除色素等杂质,gC-MS采用全扫描/选择离子监测模式(SCAn/SIM)采集数据后进行定性/定量分析。方法的相对标准偏差(rSd)≤16.70%(6.9~84.6ng/g,n=5);5种不同加标浓度下,待测农药的标准加入回收率在57.4%(甲胺磷)~109.9%(马拉硫磷)之间;各农药组分的定性检出限(3σ)为0.10~10.5ng/g,定量检出限(10σ)为0.33~20.0ng/g。A method was developed for the simultaneous determination of 33 pesticide residues, including organochlorine, organophosphorus and pyrethroid pesticide, in honeysuckle by gel permeation chromatography(GPC) purification and gas chromatography-mass spectrometry(GC-MS) detection.The pesticides were extracted using mixed solvent of ethyl-acetate and cyclohexane(1∶1, V/V).The pesticides extracted from sample were separated and purified with matrices such as pigment by gel permeation chromatography.The pesticides were finally separated and detected by GC-MS with full scan and selective ion monitor mode simultaneously.The precisions of developed method with relative standard deviation for 33 pesticide were lower than 16.7%(6.9-84.6 ng/g, n=5).The recoveries for 33 pesticide standards spiked samples were between 57.4%(methamidophos) and 109.9%(malathion).Limits of detection(3σ) and quantifications(10σ) of the method were 0.10-10.5 ng/g and 0.33-20.0 ng/g, respectively.福建省自然科学重点基金(No.B0220001)资

Determination of 33 Pesticide Residues in Honeysuckle by Gel Permeation Chromatography Purification and Gas Chromatography-Mass Spectrometry

A method was developed for the simultaneous determination of 33 pesticide residues, including organochlorine, organophosphorus and pyrethroid pesticide, in honeysuckle by gel permeation chromatography (GPC) purification and gas chromatography-mass spectrometry (GC-MS) detection. The pesticides were extracted using mixed solvent of ethyl-acetate and cyclohexane (1: 1, V/V). The pesticides extracted from sample were separated and purified with matrices such as pigment by gel permeation chromatography. The pesticides were finally separated and detected by GC-MS with full scan and selective ion monitor mode simultaneously. The precisions of developed method with relative standard deviation for 33 pesticide were lower than 16. 7% (6. 9 - 84. 6 ng/g, n = 5). The recoveries for 33 pesticide standards spiked samples were between 57. 4% (methamidophos) and 109. 9% (malathion). Limits of detection (3 sigma) and quantifications (10 sigma) of the method were 0. 10 - 10.5 ng/g and 0.33 - 20.0 ng/g, respectively