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2 results about "Potassium hydrogen phthalate" patented technology
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Potassium hydrogen phthalate, often called simply KHP, is an acidic salt compound. It forms white powder, colorless crystals, a colorless solution, and an ionic solid that is the monopotassium salt of phthalic acid. KHP is slightly acidic, and it is often used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weigh accurately. It is not hygroscopic. It is also used as a primary standard for calibrating pH meters because, besides the properties just mentioned, its pH in solution is very stable. It also serves as a thermal standard in thermogravimetric analysis.
A quantitative bottle for rapid weighing of potassium hydrogen phthalate with a fixed mass standard
This utility model discloses a quantitative bottle for rapid weighing of potassium hydrogen phthalate with a fixed mass standard, belonging to the field of propellant analysis technology. It includes: a bottle body for containing powdered reagents; a cap connected to the bottle body's opening via threads; a control plate rotatably mounted on the upper surface of the cap, having multiple circumferentially distributed outlets of different sizes; and a slider radially slidable within the cap and in contact with the bottom surface of the control plate, the slider having multiple through-holes, each with a volume corresponding to a different standard weighing value. The rotation of the control plate switches the outlet combination state, allowing selective alignment of the multiple through-holes with the outlets during a single slide of the slider. This quantitative bottle for rapid weighing of potassium hydrogen phthalate with a fixed mass standard allows for various arrangements and combinations of the multiple through-holes and outlets, fulfilling diverse quantitative requirements.
Owner:CHINESE PEOPLES LIBERATION ARMY UNIT 63605
A mixed reagent for COD detection based on petrochemical wastewater, a detection reagent tube and a digestion method
PendingCN122130462APhysical/chemical process catalystsWater contaminantsPolycyclic aromatic hydrocarbonPotassium dichromate
This application relates to the field of environmental monitoring and water quality analysis technology, and in particular to a mixed reagent, test reagent tube, and digestion method for COD detection of petrochemical wastewater. The components, by mass percentage, are: sulfuric acid 75.0–90.0%, potassium dichromate 0.5–1.0%, silver sulfate 1.0–2.7%, scandium sulfate 0.01–0.07‰, potassium hydrogen phthalate 0.1–0.25‰, glucose 0.1–0.25‰, with the remainder being pure water; the mixed reagent does not contain mercuric sulfate. This application enables mercury-free and highly efficient digestion of high-salt, high-organic-content petrochemical wastewater, improves the oxidation efficiency of benzene compounds and polycyclic aromatic hydrocarbons, reduces the detection limit to below 5 mg / L, and the wastewater is easy to treat, combining high accuracy with environmental friendliness.
Owner:ZHEJIANG TITRC TECH CO LTD