China possesses the world’s largest reserves of rare earth elements; however, if these are not developed and utilised properly, they can pose significant risks to the environment, living organisms and human health. Rare earth elements and their compounds,[more]

Turbidity is a measure of the degree to which suspended particles in water obstruct the passage of light. Water turbidity is caused by suspended matter present in the water, such as silt, colloidal matter, organic matter, plankton and microorganisms. The[more]

For laboratory novices who are new to spectrophotometers, mastering standard operating procedures is essential. Incorrect operation not only affects data accuracy but may also damage the instrument. This article uses a common UV-Vis spectrophotometer as a[more]

Objective: This study aims to investigate the application of UV spectrophotometry based on different standards for determining the triterpene content in broken-cell-wall Ganoderma lucidum spore powder.[more]

A UV-visible spectrophotometric method was established for the determination of bismuth dinitrate in Chen Xiang Lu Bai Lu tablets. The detection wavelength was 326 nm, with dilute hydrochloric acid used as the extraction solvent, and ultrasonic extraction[more]

In industrial production, iron-based vessels and pipelines are prone to iron corrosion and the formation of scale, which seriously compromises operational safety and quality assurance.[more]

The 2025 edition of the Pharmacopoeia of the People's Republic of China (hereinafter referred to as the Chinese Pharmacopoeia) stipulates explicit microbial limits for multiple Chinese herbal preparations. Consequently, effective detection techniques[more]

Abstract: Heavy metal contamination represents one of the primary threats to food safety, potentially posing serious health risks when entering the human body via the food chain. Establishing efficient and accurate heavy metal detection techniques is ther[more]

Di(2-ethylhexyl) phthalate (DEHP) is commonly added during the manufacturing process of single-use plastic blood bags; however, DEHP is carcinogenic and teratogenic.[more]

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]