Relevant requirements for testing in the laboratory Chemical reagents are high-purity chemicals that meet certain quality requirements and are the material basis for analytical work. The purity of the reagent is very important for the analytical test. It will affect the accuracy of the result. If the purity of the reagent does not meet the

Basic steps in food inspection in the laboratory The basic steps of food inspection are: sample collection; sample processing; sample analysis and detection; analysis results recording and processing in four stages. 1 sample collection The collection of samples, also known as sampling and sample preparation, refers to the extraction of a representative sample for analysis

Main factors affecting the weighing results of electronic balances 1, storage time Electronic balances are themselves sophisticated electronic instruments. Once stored for a long time, they will cause deviations in their internal electronic systems, and then the results of the symmetry will affect them. Therefore, before using electronic balances for weighing, be sure to balance

Common purification and separation methods in laboratories Purification refers to purifying the mixture to remove impurities, and obtaining the host material in the mixture, and the purified impurities do not have to consider the chemical composition and physical state. There are many ways to separate mixtures, but they can be divided into two broad categories

Fluorescent quantitative PCR laboratory equipment list First, the Reagent storage and preparation area 1 2~8°C and -15°C refrigerator2 mixer (heatable)3 High pressure resistant centrifuge tube and sampler tip (with filter)4 balance5 pressure cooker Second, the specimen preparation area 1 2~8°C refrigerator and -20°C or -80°C refrigerator2 high speed desktop refrigerated centrifuge3 mixer4 water bath or

Cosmetic industry laboratory equipment list 1 Electronic balance: weighing 2 Moisture titrator: Determination of the amount of water in raw materials and products 3 UV spectrophotometer: Qualitative or quantitative analysis of raw materials and semi-finished products 4 Fourier transform infrared spectrophotometer: qualitative analysis of cosmetic raw materials 5 Tablet Tester: Handling infrared samples 6 Gas

Food industry laboratory equipment list 1 Turbidimeter: measuring water turbidity 2 Abbe refractometer: measuring the refractive index and average dispersion of transparent, translucent liquid or solid 3 color difference meter: test product color 4 Conductivity meter: measuring the conductivity value of the electrolyte solution 5 Spectrophotometer: Quantitative Analysis 6 photoelectric turbidity meter: measuring liquid turbidity

Tissue culture laboratory equipment list 1 Acidity meter: measuring HP value 2 Conductivity meter: measuring the conductivity value of the electrolyte solution 3 polarimeter (self-view auto): measure the optical rotation of the substance, analyze the concentration, purity, sugar content of the substance 4 Gas Chromatograph: Qualitative and Quantitative Analysis 5 Liquid Chromatograph: Qualitative and Quantitative

Environmental monitoring station laboratory equipment list 1 pH meter: measuring pH 2 Conductivity meter: measuring the conductivity value of the electrolyte solution 3 liquid chromatograph: qualitative and quantitative analysis 4 Gas Chromatograph: Qualitative and Quantitative Analysis 5 UV-visible spectrophotometer: measuring the absorption of monochromatic radiation of different wavelengths, quantitative analysis 6 Visible spectrophotometer: measuring the

Agricultural Products Testing Center Laboratory Equipment List 1 pH meter: measuring pH2 Conductivity meter: measuring the conductivity value of the electrolyte solution3 liquid chromatography: qualitative and quantitative analysis4 Gas Chromatograph: Qualitative and Quantitative Analysis5 automatic potentiometric titrators: acid-base titration, redox titration, precipitation titration, complexometric titration6 UV-visible spectrophotometer: measuring the absorption of monochromatic radiation of different