摘要
建立了在氧化剂存在下利用分子识别测定六次甲基四胺的电化学分析方法。在KH2PO4 Na2HPO4(pH6.24) β环糊精(βCD)的支持电解质中,六次甲基四胺与βCD形成的包合物于-0.80V(vs.SCE)电位处产生一极谱还原波;加入H2O2后,该还原波的峰电流增加约10倍,峰电位基本不变,产生了一较灵敏的极谱催化波。其二阶导数峰电流ip″与六次甲基四胺浓度在4.0×10-6~5.0×10-4mol/L范围内呈良好线性关系(r=0.9990,n=8),检出限为2.0×10-6mol/L。该方法可用于工业乌洛托品和树脂样品中六次甲基四胺的测定。
<Abstrcat>The reduction wave of Hexamethylenetetramine-β-CD appeared at ca. (0.80 V (vs. SCE) in 0.05 mol/L KH_2PO_4-Na_2HPO_4 (pH 6.24) solution. In the presence of H_2O_2, the reduction wave is catalyzed to produce a parallel catalytic wave. Based on the catalytic wave, a novel method for the determination of hexamethylenetetramine is proposed. The peak current of the catalytic wave is rectilinear over Hexamethylenetetramine concentration in the range 4.0×10^(-6)~5.0×10^(-4) (mol/L). The peak current of the catalytic wave is ca. 10 times higher than that of the corresponding reduction wave. The detection limit is 2.0×10^(-6) mol/L. The proposed method can be applied to the direct determination of Hexamethylenetetramine in industrial products.
出处
《分析试验室》
CAS
CSCD
北大核心
2005年第7期32-34,共3页
Chinese Journal of Analysis Laboratory
基金
河南省自然科学基金(No.051102)
关键词
六次甲基四胺
Β-环糊精
分子识别
包合物
Hexamethylenetetramine
β-cyclodextrin
Molecular recognition
Inclusion compound