کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2507260 1117482 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of Pb (Lead), Cd (Cadmium), Cr (Chromium), Cu (Copper), and Ni (Nickel) in Chinese tea with high-resolution continuum source graphite furnace atomic absorption spectrometry
ترجمه فارسی عنوان
تعیین پتاسیم (سرب)، کادمیوم، کروم (کروم)، مس (مس) و نیکل (نیکل) در چای چین با طیف سنج جذب اتمی کوره گرافیتی با کیفیت بالا
کلمات کلیدی
چای چینی، اسپکترومتر جذب اتمی کوره گرافیتی پیوندی، فلزات سنگین، تجزیه و تحلیل کمی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
چکیده انگلیسی

The contents of lead, cadmium, chromium, copper, and nickel were determined in 25 tea samples from China, including green, yellow, white, oolong, black, Pu'er, and jasmine tea products, using high-resolution continuum source graphite furnace atomic absorption spectrometry. The methods used for sample preparation, digestion, and quantificational analysis were established, generating satisfactory analytical precisions (represented by relative standard deviations ranging from 0.6% to 2.5%) and recoveries (98.91–101.32%). The lead contents in tea leaves were 0.48–10.57 mg/kg, and 80% of these values were below the maximum values stated by the guidelines in China. The contents of cadmium and chromium ranged from 0.01 mg/kg to 0.39 mg/kg and from 0.27 mg/kg to 2.45 mg/kg, respectively, remaining in compliance with the limits stipulated by China's Ministry of Agriculture. The copper contents were 7.73–63.71 mg/kg; only 64% of these values complied with the standards stipulated by the Ministry of Agriculture. The nickel contents ranged from 2.70 mg/kg to 13.41 mg/kg. Consequently, more attention must be paid to the risks of heavy metal contamination in tea. The quantitative method established in this work lays a foundation for preventing heavy metal toxicity in human from drinking tea and will help establish regulations to control the contents of heavy metals in tea.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food and Drug Analysis - Volume 24, Issue 1, January 2016, Pages 46–55
نویسندگان
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