The organophosphorus pesticides in the water samples were extracted with chloroform, concentrated and fixed to volume, then separated by gas chromatography and detected by mass spectrometry. Trichlorfon in water samples was determined after being converte

For the detection of petroleum substances in water by fluorescence spectrometry, when the volume of the water sample is 500ml, the volume of the extract is 25ml, and a 1cm cuvette is used, the detection limit of the method is 0.005mg/L, and the lower limi

Pyridine is estimated that many people do not understand that it is an organic compound that mainly exists in petroleum, coal tar and other substances. Generally, it is rarely encountered in the environment, but as a raw material for the production of dru

Purge and trap gas chromatography mainly uses nitrogen or other inert gas to purge the sample at a certain flow rate, and the purged gas passes through a trap tube equipped with an appropriate adsorbent for enrichment; after the purge procedure is complet

The principle of using high performance liquid chromatography to detect the content of naphthol in water is to extract a certain amount of acidified sample (pH=1-2) with a C18 solid phase extraction column, elute with methanol, and the naphthol in the elu

The pollution of nitrophenolic compounds generally does not appear in drinking water, because most of these pollutants are caused by the illegal discharge of industrial wastewater. But in many cases there are exceptions, so the test personnel must also be

The volatile organic compounds in water are basically the same as those in air, soil and other media, such as methylene chloride, trichloroethylene and toluene. As early as 2012, my countrys environmental protection standards stipulated the determination

Most of the total antimony in sewage comes from the textile printing and dyeing industry, especially in the eastern coastal areas of my country where the printing and dyeing textile industry is relatively developed. The antimony element will be deposited

Glyphosate mentioned that this substance is believed to be familiar to many people who deal with the land. As a broad-spectrum organophosphorus herbicide, it can be seen in the north and south of my country. Although the emergence of glyphosate has greatl

Generally, inductively coupled plasma emission spectrometry is used to determine the total zinc in urban sewage, and the measurement range is 0.02mg/L-2000mg/L. Through volatilization, atomization, excitation, and collision, characteristic spectral lines