Florfenicol is an animal-specific antibacterial drug approved by the Ministry of Agriculture. It is mainly used for bacterial diseases of pigs, chickens and fish caused by sensitive bacteria, especially for respiratory infections and intestinal infections. Florfenicol is prohibited in poultry. Since its successful research, florfenicol has been widely used in many countries and regions in Japan, the United States and Europe. China Ministry of Agriculture No. 235 Announcement "Maximum Residue Limits of Veterinary Drugs in Animal Foods" stipulates that florfenicol can be used as a broad-spectrum antibacterial drug for pigs, cattle, sheep, poultry, fish and other livestock. Florfenicol is generally caused by the addition of feed or the treatment of poultry diseases. Florfenicol has an anti-inflammatory effect on the reproductive system of chickens, but it also slightly inhibits the production of reproductive hormones, causing the death of early embryos of eggs. Therefore, the 235th Announcement "Maximum Residue Limits of Veterinary Drugs in Animal Foods" stipulates that "poultry (banned eggs)" is allowed to be detected from chicken, skin, fat, liver and kidney from the inspection point of view, but eggs are not detected. According to relevant US regulations, florfenicol can be used for pigs, cattle and fish; the EU is only allowed to use fish for The ADI value (average daily allowable intake) of florfenicol is 0 to 3 μg/kg body weight/day, calculated as 60 kg body weight for adults, and daily intake of 0-180 μg florfenicol from the diet has no health hazard. Under normal circumstances, consumers do not have to worry too much about the detection of florfenicol in eggs. However, long-term consumption of florfenicol residues exceeding the standard has certain risks to human health. The source of florfenicol in the eggs may be detected in the chicken feed of the enterprise or in the treatment of poultry diseases. The residual florfenicol used in the chickens is accumulated in the poultry and then transferred to the eggs.
Notch filters (BEF, band inhibition) can transmission most wavelengths, but attenuates light to very low levels in a specific wavelength range (BEF). Notch filters, in contrast to band-pass filters, only inhibit light in a narrower wavelength range.
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