تعیین مقادیر تجمع‌یافته عناصر سرب، کادمیم، کروم و نیکل در دو نوع کاهوی عرضه شده در بازار مصرف شهر همدان

محورهای موضوعی : امنیت غذایی

سهیل سبحان اردکانی ¹ , سیدمیلاد جعفری ²

1 - استاد گروه محیط‌زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران. *(مسوول مکاتبات)
2 - کارشناس ارشد محیط‌زیست، دانشکده علوم پایه، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران.

تاریخ دریافت : 1401/05/18 تاریخ پذیرش : 1401/09/16 تاریخ انتشار : 1401/10/01

کلید واژه: فلز سنگین, کاهو, ایمنی غذایی, بیشینه رواداری, همدان,

چکیده مقاله :

زمینه و هدف: نظر به اهمیت ایمنی غذایی و تاثیر سوء عناصر بالقوه سمی بر سلامتی انسان، این مطالعه با هدف بررسی غلظت تجمع‌یافته عناصر سرب، کادمیم، کروم و نیکل در بخش‌های ساقه و برگ دو نوع کاهوی ایرانی و کاهوی گرد (پیچ) عرضه‌شده در بازار مصرف شهر همدان انجام شد. روش بررسی: تعداد 15 عدد کاهوی ایرانی و 15 عدد کاهوی گرد از بازار مصرف شهر همدان خریداری شد. پس از آماده‌سازی و هضم اسیدی نمونه‌ها در آزمایشگاه، غلظت تجمع‌یافته عناصر سرب، کادمیم، کروم و نیکل در آن‌ها به‌روش ولتامتری عاری‌سازی آندی در سه تکرار خوانده شد. پردازش آماری داده‌ها نیز با استفاده از ویرایش 19 نرم‌افزارSPSS انجام شد. یافته‌ها: نتایج نشان داد که میانگین غلظت تجمع‌یافته عناصر سرب، کادمیم، کروم و نیکل در بخش‌های برگ و ساقه کاهوی ایرانی به‌ترتیب برابر با 3/19 و 6/40؛ 103 و 233؛ 00/8 و 0/23؛ و 2/30 و 171 میلی‌گرم در کیلوگرم و در کاهوی گرد نیز به‌ترتیب برابر با 07/9 و 8/20؛ 4/35 و 118؛ 9/12 و 8/37؛ و 215 و 279 میلی‌گرم در کیلوگرم بوده است. نتایج مقایسه میانگین غلظت تجمع‌یافته عناصر در نمونه‌ها با بیشینه رواداری WHO/FAO نشان داد که به‌جز در مورد میانگین غلظت عنصر نیکل در کاهوی ایرانی، میانگین غلظت سایر عناصر از حد مجاز بیش‌تر بوده است. همچنین، به‌جز برای عناصر نیکل و سرب در کاهوی ایرانی، نتایج مقایسه بین بخش‌های برگ و ساقه نمونه‌ها نشان‌دهنده وجود اختلاف معنی‌دار آماری در سطح %95 بود. بحث و نتیجه‌گیری: از آن‌جا که کاهوی عرضه‌شده در بازار مصرف شهر همدان فاقد ایمنی غذایی برای مصرف‌کنندگان بود، لذا، نسبت به پایش محصولات کشاورزی پرمصرف قبل از عرضه به بازار مصرف توصیه می‌شود.

چکیده انگلیسی:

Background and Objective: Considering the importance of food security and adverse effects of potentially toxic elements (PTEs) on human health, the present study was conducted to assess the contents of Pb, Cd, Cr and Ni in two types of lettuce (Romaine lettuce and Iceberg lettuce) marketed in city of Hamedan in 2013. Material and Methodology: In this descriptive study, a total of 15 samples of each type of lettuce were purchased. After acid digestion of samples in the laboratory, the Pb, Cd, Cr and Ni contents were determined using anodic stripping voltammetry. All statistical analyses were performed using the SPSS statistical package. Findings: The results showed that the average contents of Pb, Cd, Cr, and Ni in leaves and stems of Romaine lettuce were 19.3 and 40.6; 103 and 233; 8.00 and 22.8; and 30.2 and 171 mg/kg, respectively, while, the average contents of Pb, Cd, Cr, and Ni (mg/kg) in leaves and stems of Iceberg lettuce were found to be 9.07 and 20.8; 35.4 and 118; 12.9 and 37.8; 215 and 279, respectively. Also, based on the results obtained, except for Ni in Romaine lettuce, the mean contents of all the analyzed elements were significantly higher than the maximum permissible concentration (MPC) established by FAO/WHO. Discussion and Conclusion: In conclusion, due to studied lettuces were not suitable for consume by human, therefore, regular monitoring of foodstuffs should be noticed in order to maintenance the consumer's health.  

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