ارزیابی غلظت فلزات سنگین (مس، سرب و آرسنیک) در چای لاهیجان و چای هندوستان
محورهای موضوعی : میکروبیولوژی مواد غذایی
شیرین هوشمند زاده
1
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عبدالله علیزاده کارسالاری
2
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داریوش خادمی شورمستی
3
1 - -
2 - استادیار گروه شیمی، واحد سوادکوه، دانشگاه آزاد اسلامی، سوادکوه، ایران
3 - دانشیار گروه کشاورزی، واحد سوادکوه، دانشگاه آزاد اسلامی، سوادکوه، ایران
کلید واژه: آرسنیک, چای, حد مجاز, سرب, مس ,
چکیده مقاله :
مقدمه: چاي یکی از محبوبترين نوشيدنيها در جهان است. مخاطرات آلودگي برگ چاي با فلزات سنگين موجب نگرانی مصرفکنندگان و سلامت جهانی است. ارزیابی غلظت فلزات سنگين (مس، سرب و آرسنیک) به منظور پایش مستمر وضعیت آلودگی احتمالی ضروری بهنظر میرسد.
مواد و روشها: به روش طيفسنجي جذب اتمي با کوره نمونههای چاي سياه كشت شده در ايران (چای لاهیجان) و وارداتي (چای هندوستان) غلظت مس، سرب و آرسنیک اندازهگیری شد. غلظت عناصر تعیین شده با استفاده از آمار توصیفی و استنباطی با استفاده از 6 تکرار از هر نمونه مورد تجزیه و تحلیل قرار گرفت. میانگین غلظت هر عنصر با حدود استاندارد ملی ایران و نیز در بین دو نمونه چای مورد مقایسه قرار گرفت (05/0P<).
یافتهها: نتایج نشان که محتوای عناصر مس، سرب و آرسنیک (میلیگرم در کیلوگرم) در هر یک از نمونههای چای هندوستان (بهترتیب 3/11، 180/0 و 125/0) و چای لاهیجان (بهترتیب 1/10، 108/0 و 077/0) پایینتر از حدود استاندارد ملی ایران بودند و همچنین اختلاف آماری معنیداری بین غلظت هر یک از عناصر در بین نمونههای وارداتی و داخلی دیده نشد.
نتیجهگیری: نتایج نشان داد چای ایرانی (لاهیجان) و وارداتی (هندوستان) از نظر آلودگی به عناصر مس، سرب و آرسنیک در محدودهی بیخطر قرار دارند. در عین حال پایش مستمر غلظت عناصر سنگین و خطرناک ضروری بهنظر میرسد.
Abstract
Introduction: Tea is one of the most popular drinks in the world. The risks of contamination of tea leaves with heavy metals cause concern for consumers and global health. It seems necessary to evaluate the concentration of heavy metals (copper, lead and arsenic) to continuously monitor the likely pollution situation.
Materials and methods: copper, lead and arsenic concentrations of black tea internal (Lahijan tea) and imported (Indian tea) samples were measured by atomic absorption spectrometry with the furnace. The determined element concentrations were analyzed using descriptive and inferential statistics using 6 replicates of each sample. The concentration of each element mean was compared with the Iran national standard and between two tea samples (P<0.05).
Findings: The results show that the content of copper, lead and arsenic elements (mg/kg) in each sample of Indian tea ( 11.3, 0.180 and 0.125 respectively) and Lahijan tea (10.1, 0.108 and 0.077 respectively) is lower than the Iran national standard, as well as there is no significant difference between the elements concentration in imported and domestic samples.
Conclusion: The results showed that Iranian tea (Lahijan) and imported tea (India) are in the safe range in terms of copper, lead and arsenic contamination. At the same time, it seems necessary to continuously monitor the concentration of heavy and dangerous elements.
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