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Bromine is a commonly used reagent in chemistry, because of its volatile and unstable characteristics, so the determination of its content has become the center of research. In traditional chemical analysis,[more]

The minimum detection mass of this method is 0.1μg. If 250mL water sample is distilled for determination, the minimum detection mass concentration is 0.002 mg/L.[more]

Under acidic conditions, Fe3+ and Al3+ in the solution react with the test iron reagent to form different metal complexes.[more]

Deepen the understanding of oil pollution in the environment, master the analysis method and technology of oil, and learn to use ultraviolet spectrophotometer.[more]

Objective: To establish a method for the determination of geniposide in Qinghuozhi cereal by ultraviolet spectrophotometry (UV), and to evaluate the uncertainty of the result.[more]

Wallpaper, also known as wallpaper, is a kind of interior decoration materials used for pasting walls, widely used in residential, office interior decoration and so on. Wallpaper products may produce harmful substances such as vinyl chloride, formaldehyde[more]

Theory：The tobacco sample was extracted with water, and the total plant alkaloids in the extract, measured as nicotine, reacted with p-aminobenzene sulfonic acid and cyanogen chloride, which is produced by an online reaction of potassium thiocyanate and s[more]

Introduction: Ethylene glycol, also known as glycol. Chemical formula: HOCH2—CH2OH. A simple binary alcohol. It is colorless, odorless, with sweet liquid, which can be mixed with water in any proportion. It is used for solvent, antifreeze and synthetic po[more]

1 , far ultraviolet ( VUV ) absorption band with a relatively small this should be very small, usually UV spectrophotometer from 200 nm wavelength is started , because the far- ultraviolet ( VUV ) absorption band is strongly absorbed by air , by definitio[more]