| [Objective]Aluminium,plumbum and cadmium , which widely exist in food and living environment, play an important role in normal vital function. Aluminium is the most contentment metal in lithosphere, Aluminium and its compound can cumulate in human body and produce chronic toxicity for nervous and immune system. It leads to multi-diseases by affecting oxygenated system and inducing damnification for genetic material.Plumbum is widely used in daily life but it is poisonous for external and central nervous system, hematopiesis system, cardiovascular system and genital system. It is positive carcinogenesis for animal and dubious cancerogen for human being.Cadmium is one of poisonous heavy metal elements which widely exists in environment. It is listed as the sixth toxic substance for human health by American committee of toxic administration. Cadmium is listed as the premier cancerogen not only for animal but also for human being by international carcinoma research institution. Cadmium is urgent and chronical poisonous for kidney, liver and sex gonad whereas liver is the important target organ.This study on Dong'e County through the use of aluminium-containing part of the food additive testing, investigation and analysis of the county aluminium content in foods such a level, the evaluation of the safety of such foods; The aluminum plant near the number of grain and vegetables in aluminum content testing, and samples were compared with the control, investigation of the aluminum production process of the crops in the area around the content of aluminum; The goods were sampling of plumbum, cadmium detection analysis, survey residents of East Azerbaijan intake of plumbum, cadmium and aluminum plant near the level of grain and vegetables in the plumbum, at the Dong'e County in food, vegetables of lead, cadmium content difference. People found the diet structure of the potential risk factors for the residents to select reasonable meal structure, reduce harmful trace elements higher intake of food and reduce the damage to the body and provide a theoretical basis.[Methods]1.SampIe collectionDong'e County sample: Samples were collected according to the narrow terrainin the northeast and the southwest, in accordance with principles of cluster random sampling. Flour food such as oil sticks, fried cakes, buns, bread, starch noodles were purchased in the county and township stalls and shops;Samples of vegetables (spinach, rape) and wheat, corn samples were collected in Niudian the Northeast, the central copper towns, the rural southwestern Liujitian vegetable, cattle Ganyanwa by East, West, South and North respectively Acquisition four villages ,, Liu set by topographic East, West, three villages were collected, the three samples collected every village;, buns, bread, starch noodles purchased in East Azerbaijan county and township share of the production, the shop; other sample (moon cakes, cake, etc.) from East Azerbaijan Branch at quarantine stations and food supervision, in accordance with statutory procedures collected from food production units.Around the aluminum sample: In accordance with random sampling principles in the three regions of aluminum around the railway station, Guo, sanshilipu families and villagers in the rural vegetable sheds collected samples collected each sampling point three samples.2. Process of samplesFlour Food (cake, starch noodles, moon cakes, oil sticks, etc.): placed in the oven, 100℃conditions, dry 6 hours, take place after the cold dry cleaner bag sealed plastic food preservation reserve. Vegetable sample was cleaned three times by deionized water and process the same as the dry sample.Food samples: Direct selection of appropriate, installed in a clean plastic food bag drying preservation reserve. 3. Experimental methods:3.1 Pre-process:Samples from reserve amount in the mill in the smash, the same location collecting samples, according blending and accurately that about 0.1 g sample, placed in the digestive tract, by adding 1 mlHN03 (GR), and 7 ml of water tank hydrogen peroxide and 1 ml, microwave digestion. After the digestion, constant volume to 10 ml, transfer to a plastic tube Cypriots, 4°C frozen preservation reserve.3.2 Analysis of sample:As a sample to digest blank blank, zero absorbance conditioning equipment, automatic sampler sampling, graphite furnace Determination series of standards and sample absorbance solution, calculated by regression equation obtained samples of aluminum, lead the various elements concentration.[Results]1. Aluminum content in foods1.1 Flour the aluminum content in foodsFlour food oil sticks 33, starch noodles 30 samples, all over the state standards, exceeding rate was 100%, the highest in more than the national standard 7.98-fold; cake 57, exceeding rate of 90.48 percent, the highest in more than the national standard 8 times; Expanded Food 21, exceeding rate of 46.67 percent; biscuits, seamseed respectively nine and six Any excess rates were 20.00%, 16.67%; moon cakes, bread, steamed bread, noodles all qualified seized samples failing samples. Oil sticks, cake several times exceeded national standards; seamseed, cakes, bread, buns in the national standards are within the scope of the biscuits, such as extruded ' aluminum content of foods, balanced with the national standards.1.2 Vegetables aluminum content in foodsLeafy vegetables (spinach, rape) content higher, spinach 15 sampling points, 45 samples, the highest level for 1289.13mg/kg, the minimum was 133.85mg/kg, an average of 465.98 mg/kg; Rape 13 sampling , 39 samples, the highest content of 724.85mg/kg, the minimum was 217.09mg/kg, an average of 463.89mg/kg. Aluminum plant nearby rural vegetables (spinach, rape) and the Dong'e County control group vegetables (spinach, rape) aluminum content, not statisticallysignificant(P>0.05).1.3 The aluminium content in wheat and corn around the aluminum plant and inthe control samplesAt 20 Wheat sampling points, in wheat samples around the aluminum plant the highest aluminum content was 101.58 mg / kg, the lowest was 6.88 mg/kg, an average of 33.63 mg / kg; In the control samples of Dong'e County, the highest was 1.04mg/kg, the lowest was 3.58mg/kg. The aluminium content in wheat around the aluminum plant was higher than in the control group of Dong'e County , with statistical significance (P<0.05).At 20 corn sampling points, in corn samples around the aluminum plant the highest aluminum content was 20.61 mg/kg, the lowest was 0.17 mg/kg, an average of 4.91 mg/kg; In the control samples of Dong'e County, the highest was 27.07mg/kg, the lowest was 0.73mg/kg, an averge of 17.32mg/kg. The aluminium content in corn around the aluminum plant compared with the control group of Dong'e County, there was no statistical significance (P>0.05).2. Plumbum content in foods2.1 Plumbum content in flour foodsIn the flour food, expanded food is the food with the highest plumbum content, the small local workshops have higher plumbum content, with 3 samples exceeding the standards; At the formal large statel enterprises, the expanded food's plumbum content was about 10 times lower than the local lproducts. Moon cakes's exceeding rate was 16.67%, steamed bread at 14.3 %, other food items were within the scope of the national standard.2.2 Vegetables plumbum content in foodsPlumbum content in vegetables (spinach, rapeseed) , all exceeding the state standards, with the rate at 100%. At 20 spinach sampling points, the highest content was 1.39 mg / kg, the lowest was 0.44 mg / kg, an average value of 0.67 mg / kg, Around the aluminum plant, spinach plumbum content was higher than rural Dong'e County in the control group, with significant difference (P <0.05). At 20 rape sampling points, the highest content was 1.05 mg / kg, the lowest was 0.37 mg / kg,an average value of 0.60 mg / kg, the plumbum content around the aluminum plantcompared with the control in Dong'e County, there was no statistical significance(P>0.05).2.3 Plumbum content in food crops compared with the controlIn the food category, 20 samples of wheat, only one in the control exceeding the standards, the rest are in the normal GB range. In plumbum content of wheat near the aluminium plant compared with the control in Dong'e County, there was no statistical significance (P> 0.05). 20 samples of wheat, 4 in the control exceeding the standards, In plumbum content of wheat near the aluminium plant compared with the control in Dong'e County, there was no statistical significance (P>0.05).3. The cadmium content in food3.1 The cadmium content in flour foodsThe cadmium content is lower in flour food, all below the national standards.3.2 The cadmium content in vegetables compared with the controlThe cadmium contents in rape and spinach of vegetables are all over the state standards, with the exceeding rate at 100%. The cadmium content in vegetables (spinach, rape) near the aluminium plant compared with the control in Dong'e County, there was no statistical significance(P>0.05).3.3 The cadmium content in food crops compared with the controlIn the food category, 20 samples of wheat are within the scope of the GB, cadmium content in wheat near the aluminium plant compared with the control in Dong'e County, there was no statistical significance(P>0.05). 20 samples of corn are within the scope of the GB, cadmium content in corn near the aluminium plant compared with the control in Dong'e County, there was no statistical significance (P>0.05).[Conclusion]1. In flour-made foods of Dong'e County, the aluminium content is significantly higher than the national standards in oil sticks, cakes, starch noodles, but lower in other foods. 2. Compared with the control, in vegetables and grain samples surrounding the aluminium plant, there is significant difference only in aluminium of wheat, showing the heavier pollution on the plants with longer life but lighter pollution on the plants with shorter life by waste emissions.3. In flour-made foods of Dong'e County, the plumbum content is higher in expanded food but significantly lower than the national standards in other samples.4. There is no significant effect by waste emissions from the aluminium plant on the plumbum and cadium content in vegetables and grain in the nearby villages.5. Cadmium content in flour-made foods are significantly lower than the national standards in Dong'e County6. Aluminium, plumbum and cadium content in vegetables (spinach, rape) are all higher than the national standards.,... |
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