Set parameters and place the sample. Set temperatures for "Sample," "Valve Box," and "Tubing" to 50 degrees Celsius, 130 degrees Celsius, and 140 degrees Celsius, respectively. Once the temperatures stabilize, introduce the sample, wait for 30 minutes for equilibrium, and proceed with the following steps. Pre-sample purging. Set the purging...

Apparatus: A setup comprising a heating bath, thermometer, and assembly of a melting point tube. (Perforation of the rubber stopper and installation of the melting point determination device) Procedure: (Demonstration) a. Drying and Grinding of the Sample: Ensure the sample is thoroughly dried and ground. b. Sample Loading: Cut a...

1. Nylon Membrane: Features: Good temperature resistance, can withstand 121°C saturated steam sterilization for 30 minutes, maximum working temperature of 60°C. Chemically stable, resistant to various organic and inorganic compounds such as dilute acids, dilute alkalis, alcohols, esters, oils, hydrocarbons, halogenated hydrocarbons, and organic oxidants. Applications: Used in water filtration...

Organic Microporous Membrane: Organic microporous membranes are made of organic polymers and can be produced with different pore sizes and molecular weights through various manufacturing methods. Common materials for organic microporous membranes include polyamide, polypropylene, and polysulfone. These membranes exhibit high filtration efficiency, good mechanical strength, and strong corrosion resistance....

The sterile microporous membrane is a filtration material made of high-molecular-weight chemical compounds, featuring a micro-porous structure with uniform pore distribution and high porosity, ensuring no medium detachment. It is primarily used for filtering aqueous solutions, often referred to as water system membranes. This type of membrane is non-toxic, hygienic,...

The phenomenon of choosing or using cuvettes improperly, leading to the inability to measure or causing measurement errors, often occurs in experiments and is easily overlooked by laboratory personnel. The definition of the ultraviolet (UV) region is 190-400nm, and quartz cuvettes can be used in the range of 190-900nm, while...