摘要
在pH为5.0的HAc-NaAc缓冲液中,Fe^2+催化H2O2产生^+OH,^+OH氧化I^-为I2。过量I^-与I2反应生成的I3^-,与吖啶红(AR)形成AR-I3缔合物分子。在疏水作用和分子间力作用下,AR-I3缔合物分子自动聚集形成(AR-I3)。缔合物微粒。该缔合物微粒在320,400,595nm处产生3个共振散射峰。H2O2的浓度在0.50~16.0×10^-6mol·L^-1范围内与400nm波长的共振散射光强度成线性关系,方法的检出限为2.0×10^-7mol·L^-1 H2P2,用于废水中H2O2的测定,结果满意,回收率在97.9~101.2%之间。
Under the conditions of pH 5.0 HAe-NaAc, 1.6 × 10^-3 mol· L^-1 KI-8.0 × 10^-5 mol· L^-1 Fe^2+ -4. 0 × 10^-6 mol · L^-1 H2O2-40 μg·mL^-1 acridine red (AR), when there is H2O2, reacts with I^- to form I3^-. The acridine red reacts with I3^- to form AR-I3 ion association molecule. Under the action of the intermolecular and hydrophobic forces, these association molecules automatically aggregate to form (AR-I2). association particles that exhibit three resonance scattering peaks at 320,400 and 595 nm respectively. The H2O2 concentration in the range of 0. 50-16.0× 10^-6 mol· L^-1 is proportional to the resonance scattering at 400 nm. And a new resonance scattering spectral method was described for the determination of H2O2 in water samples with satisfactory results.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2007年第1期120-122,共3页
Spectroscopy and Spectral Analysis
基金
广西自然科学基金项目(0575042)
桂林工学院科研启动基金项目资助
关键词
H2O2
吖啶红
缔合微粒
共振散射
H2O2
Acridine red
Association particle
Resonance scattering