CAJ | 학술논문

以水的质量分数为80%的O/W型(十二烷基硫酸钠/正丁醇/正庚烷/水)微乳液为介质,以氯化铵-氨水作为缓冲溶液,5-Br-PADAP为显色剂,采用六偏磷酸钠和硫脲作为联合掩蔽剂以掩蔽干扰离子,利用分光光度法直接测定了渣油中的锌(Ⅱ)。锌(Ⅱ)的显色络合物的最大吸收峰位于550 nm处,锌(Ⅱ)含量在0~0.48μg/mL范围内服从比尔定律,其表观摩尔吸收系数ε=1.24×105 L/( mol ·cm)。所得一元线性回归方程为A=1.1182×105C+0.3559(C为浓度,单位为mol/L),相关系数r=0.9999。结果表明,该方法选择性好,准确度、灵敏度高,实用性强,是一种快速、有效测定油样中微量锌(Ⅱ)的好方法,具有一定的意义和实用价值。
이수적질량분수위80%적O/W형(십이완기류산납/정정순/정경완/수)미유액위개질,이록화안-안수작위완충용액,5-Br-PADAP위현색제,채용륙편린산납화류뇨작위연합엄폐제이엄폐간우리자,이용분광광도법직접측정료사유중적자(Ⅱ)。자(Ⅱ)적현색락합물적최대흡수봉위우550 nm처,자(Ⅱ)함량재0~0.48μg/mL범위내복종비이정률,기표관마이흡수계수ε=1.24×105 L/( mol ·cm)。소득일원선성회귀방정위A=1.1182×105C+0.3559(C위농도,단위위mol/L),상관계수r=0.9999。결과표명,해방법선택성호,준학도、령민도고,실용성강,시일충쾌속、유효측정유양중미량자(Ⅱ)적호방법,구유일정적의의화실용개치。
The content of Zinc(Ⅱ) in residual oil was directly determined by 5-Br-PADAP spectrophoto-metric method in the medium of O/W microemulsion( SDS-n-C4 H9 OH-n-C7 H16-H2 O) where mass fraction of water is 80%,while NH3 Cl-NH4 H2 O is used as buffer solution,sodium hexametaphosphate and thiou-rea as masking agent to mask interfering ions. The color complex of zinc (Ⅱ) has maximum absorption peak at 550 nm. The Beer’S law is obeyed when zinc(Ⅱ)content is in the range of 0~0. 48 μg/mL. Its molar absorptivity is 1.24 ×105 L/(mol·cm),the linear regression equation A =1.118 2 ×105C +0. 355 9(C concentration unit:mol/L),the correlation coefficient r=0. 999 9. The results show that:the method has good selectivity,high accuracy and sensitivity and strong practicability. It is a rapid,effective method of determining trace zinc( II) in residual oil,which has a certain significance and practical value.