How to clean pesticide residues? how to clean vegetables pesticide residues? Cleaning of pesticide residues in fruits and vegetables

Now vegetables and fruits will be sprayed with pesticides, and pesticide residues are also very serious, then how do we clean, in order to make pesticide residues less?

Vegetables and vegetables excessive nitrogen fertilizer beware of cancer upper body. Although eating fruits and vegetables is good for health, excessive use of nitrogen fertilizer, nitric acid present in leafy vegetables, can induce esophageal cancer, gastrointestinal cancer and liver cancer and other diseases. Cheng Cheng-yung, professor of horticulture at National Taiwan University, points out that crops would not grow without nitrogen fertilizer, but any nitrogen-containing organic matter or chemical fertilizer in the soil would first be decomposed and oxidized into nitrate ions with smaller molecular weights, which are commonly referred to as nitrate ions or nitrates. Animals eating plants with excessive nitrate content may cause mild or severe toxicity. The most obvious example is "blue baby syndrome" caused by high nitrate intake, which can cause breathing difficulties and even suffocation.

Countries around the world have gradually set standards for nitrate content in vegetables, but the standards vary according to the region or length of day and night.For example, European countries only require 1,500 to 2,000 ppm for most vegetables, but recently mainland China has set more stringent standards, setting most vegetables below 450 ppm. This is a very high standard, but Taiwan has so far not paid attention to this problem. In winter, some vegetables even contain nitrates as high as 3,000 to 4,000 ppm.

Advanced countries have gradually regulated the nitrate concentration of vegetables to protect consumers. For example, Germany stipulates that the nitrate content in spinach for infants should not exceed 250 ppm. The safe dose announced by the World Health Organization (WHO) is 3.65 mg per kilogram of body weight per day, which means that a person weighing 60 kilograms can consume about 220 mg of nitrate per day. Therefore, if you eat half a catty (300 grams) of vegetables per day, the nitrate content in vegetables should not exceed 670 ppm, and if you eat 400 grams, the content should be below 500 ppm.

Peng Wang Chia-kang, academician of the Academia Sinica and director of the National Cancer Research Group, believes that in the past the ROC did not set standards for nitrate in leafy vegetables, mainly because most farmers still used animal waste as fertilizer and rarely used chemical fertilizer. In recent years, chemical nitrogen fertilizer has been used more often, only nitrate cancer risk is likely to occur over a long period of time, so she does not recommend children vegetarian, because the risk of vegetarianism is higher, the nutrients needed for growth will also be insufficient.

Principles of vegetable cleaning