摘要
在pH 7.0的磷酸盐缓冲溶液中,氯金酸被3,5-二羟基苯甲酸(DBA)还原生成的金纳米粒子在610nm处产生一个较强的共振散射峰;当有三聚氰胺(MA)存在时,DBA与MA形成多氢键化合物而不能还原氯金酸,导致610 nm处共振散射峰的强度降低。三聚氰胺的浓度在5.0×10-6～4.0×10-5 mol.L-1范围内与该共振散射峰强度的降低值(ΔI610nm)呈良好线性,其相关系数为0.996 8。该方法可用于牛奶样品中三聚氰胺的检测。
In pH 7.0 phosphate buffer solution, HAuC14 was reduced by 3, 5-dihydroxybenzonic acid（DBA） to form nanogold particles that exhibited a strong resonance scattering（RS） peak at 610 nm. However, in the presence of malemine （MA） , DBA would not reduce HAuCI4 but react with MA to form a stable complex by means of polyhydrogen bonds, which could result in the decrease of RS intensity. The decreased RS intensity was proportional to the MA concentration. Based on this, a RS method was developed for the detection of MA. Under the optimal conditions, the calibration curve was linear in the range of 5.0 ×10^-64.0×10^-5mol·L^-1 with correlation coefficient of 0. 996 8. The method was applied in the determination of MA in milk with satisfactory result.
出处
《分析测试学报》
CAS
CSCD
北大核心
2011年第11期1230-1234,共5页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(21075023
20965002)
广西自然科学基金资助项目(0991021z)
