Surface water is generally relatively clean. After 30 minutes of natural precipitation, taking the non precipitation part of the upper layer for analysis. If there are many suspended substances in the water sample or the color is darker, pretreat it by centrifugation, filtration or steam distillation. Using CIC-D120 ion chromatograph, SH-AC-3 anion column, 3.6 mM Na2CO3 + 4.5 mM NaHCO3 eluent and bipolar pulse conductance method,under the recommended chromatographic conditions,the chromatogram is as follows.Pesticides refer to a class of drugs used to kill insects, sterilize and kill harmful animals (or weeds) in order to ensure and promote the growth of plants and crops in agricultural production, especially those used in agriculture to prevent and control diseases and insect pests and regulate plant growth and weeding. It is widely used in agriculture, forestry and animal husbandry production, environmental and household hygiene, pest control and epidemic prevention, mold and moth prevention of industrial products, etc. There are many kinds of pesticides, which can be divided into insecticides, acaricides, rodenticides, nematicides, molluscicides, fungicides, herbicides, plant growth regulators, etc; According to the source of raw materials, it can be divided into mineral pesticides (inorganic pesticides), biological pesticides (NATURAL organics, microorganisms, antibiotics, etc.) and chemical synthetic pesticides; According to the chemical structure, they mainly include organochlorine, organophosphorus, organic nitrogen, organic sulfur, carbamate, pyrethroid, amide compounds, ether compounds, phenolic compounds, phenoxycarboxylic acids, amidines, triazoles, heterocycles, benzoic acids, etc. they are organic synthetic pesticides. Most pesticides have complex structures and various varieties. Although most of them can be analyzed by HPLC or GC, ion chromatography is a better choice for some compounds that do not have optical absorption and can be ionized. Ion chromatography was initially mainly used to analyze inorganic anions and anions.
With the development of ion chromatography technology, its application scope has gradually expanded. With the strengthening of people's awareness of health and environmental protection, IC has developed rapidly in the detection of pesticides, and many simple and practical detection methods have been established. This scheme mainly introduces some applications of ion chromatography in pesticide detection for your reference.
Post time: Apr-18-2023