Mendil Durali, Karatas Murat, Tuzen Mustafa
Gaziosmanpaşa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey.
Gaziosmanpaşa University, Faculty of Science and Arts, Chemistry Department, 60250 Tokat, Turkey.
Food Chem. 2015 Jun 15;177:320-4. doi: 10.1016/j.foodchem.2015.01.008. Epub 2015 Jan 12.
In this study, Cu(II), Pb(II), Zn(II), Fe(III) and Cr(III) were determined in some food and water samples after development 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) coprecipitation procedure using flame atomic absorption spectrometry (FAAS). Effects of some analytical parameter including pH, sample volume, reagent amount, centrifuge rate and time, etc. on the presented coprecipitation system were studied for the quantitative recoveries of Cu(II), Pb(II), Zn(II), Fe(III) and Cr(III) ions. The influences of matrix ions were examined. The recovery values for analyte ions were calculated ⩾ 95%. The relative standard deviation was found 8.0% and the preconcentration factor was found as 25 for all analyte ions. The detection limits (k=3, N=21) were found to be as 0.80 μg L(-1) Cu(II), 3.08 μg L(-1) Pb(II), 0.28 μg L(-1) Zn(II), 0.91 μg L(-1) Fe(III) and 1.82 μg L(-1) Cr(III). NIST SRM 1515 Apple leaves and GBW-07605 Tea certified reference materials were used to confirm the accuracy of the method. The simultaneous coprecipitation method was applied to various water and microwave digested food samples.
在本研究中，采用火焰原子吸收光谱法（FAAS），通过改进的2,9 - 二甲基 - 4,7 - 二苯基 - 1,10 - 菲啰啉（BCP）共沉淀程序，对一些食品和水样中的铜（II）、铅（II）、锌（II）、铁（III）和铬（III）进行了测定。为了实现铜（II）、铅（II）、锌（II）、铁（III）和铬（III）离子的定量回收，研究了包括pH值、样品体积、试剂量、离心速率和时间等一些分析参数对所提出的共沉淀体系的影响。考察了基体离子的影响。分析物离子的回收率计算值⩾95%。发现所有分析物离子的相对标准偏差为8.0%，预富集因子为25。检测限（k = 3，N = 21）分别为：铜（II）0.80 μg L⁻¹、铅（II）3.08 μg L⁻¹、锌（II）0.28 μg L⁻¹、铁（III）0.91 μg L⁻¹和铬（III）1.82 μg L⁻¹。使用美国国家标准与技术研究院（NIST）标准参考物质1515苹果叶和GBW - 07605茶叶认证参考物质来确认该方法的准确性。该同步共沉淀方法应用于各种水样和经微波消解的食品样品。
