Heavy metals form a versatile group of high density elements that vary considerably in their biological roles and chemical properties. Although many heavy metals are essential trace elements yet they have long been recognized as environmental pollutants due their toxic effects. Increased industrialization, urbanization anthropogenic activities like mining, smelting and other agricultural activities have resulted in accumulation of heavy metals in the environment. Heavy metals such as nickel, cadmium, zinc, copper, mercury, arsenic and chromium are not easily degradable and tend to build up in soil. These heavy metals through various routes such as fish and plants make their way into the human body and are known to have serious detrimental effects on human health at elevated levels. The harmful effects of some important heavy metals on human health have been discussed.
The purpose of current study was to estimate the incidence of total aflatoxins (B1+B2+G1+G2) in unpack spices and dried fruits. A total of 90 samples included red chillies, black pepper, figs and dried apricots were picked from shops/markets situated in Lahore - Pakistan and were analyzed by using thin layer chromatography (TLC). The results showed that aflatoxin B1 was detected in 24 (26%) samples. The results obtained were ranging between 23.99-97.42 μgkg-1 in spices, 47.68-75.78 μgkg-1 in black pepper, 6.72-14.43 μgkg-1 in figs while 13.2 μgkg-1 of aflatoxin B1 was present in apricot sample. 39.28%, 18.18%, 5.0% and 40% samples of red chilli, black pepper, dried apricots and figs were found contaminated with aflatoxins respectively. Among contaminated samples 32.14% , 13.63%, 5.0% and 15% samples of red chilli, black pepper, dried apricots and figs, respectively were found contaminated with aflatoxins beyond permissible limits. Furthermore, 17.77% i.e. n=16 of the positive samples contained Aflatoxin B1 level more than the permitted limit for entire aflatoxins as lay down by regulatory authority. From the study, it was concluded that a continuous and strict national monitoring plan is needed to improve quality and safety of spices and dried fruits supply in Pakistan.
Introduction Rice is a widely used dominant grain after wheat and is a staple food crop of various world populations [1]. Rice is a vital cereal crop, which is consumed as essential staple foodstuff in Pakistan. Basmati rice varieties are well known in whole world for quality, aroma and delicious taste. Pakistan is a central rice exporter because it is foremost cash food contributing 1.3% to the gross domestic product (GDP) [2-5]. Aflatoxin quantity would be linked with highest tolerable aflatoxin value (4 ppb). Rice shows resistance against the desert, humid, flood, hot, dry and cool
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