检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]长春理工大学纳米技术研究中心,吉林长春130022
出 处:《湿法冶金》2016年第1期80-82,共3页Hydrometallurgy of China
摘 要:利用铬天青S(CAS)在有溴化十六烷基三甲胺(CTMAB)存在下的0.5mol/I。硝酸介质中可与Pb^2+形成红褐色络合物的原理,建立一种新的测定铅的分光光度法。Pb^2+-CAS络合物的最大吸收峰位于584nm,在该波长处,Pb^2+质量浓度在O~O.8μg/mL范围内与吸光度呈良好线性关系,其回归方程为A=0.888 5ρ-0.0024,表观摩尔吸收系数ε584nm=1.46×10^5L/(mol·cm)。用该方法测定土豆和硝酸钠中的铅,结果满意。Chrome azurol S(CAS) and Pb^2+ forms a red-brown complex in 0. 5 mol/L nitric acid medium in the presence of cetyhrimethylammonium bromide, a new spectrophotometric method for determination of lead (l]) is established. The maximum absorption wavelength of the Pb^2+-CAS complex is located at 584 nm. A good linearity is presented between the concentration range of 0-0.8μg/mL of Pb^2+ and absorbance(A) at this wavelength, and its regression equation is A = 0. 888 5p- 0. 002 4. The apparent molar absorption coefficient is 1.46×10^5 L/(mol · cm) at 584 nm. This method is satisfactorily used for determination of lead in potato and sodium nitrate samples.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.16.164.60