1. Overview
Polymer polyacrylamide is an important chemical substance, which is widely used in printing and dyeing, oil extraction, water treatment and other fields. In order to ensure its quality and application effect, laboratory testing is essential. In this article, we will introduce the basic principles, methods and parameters of polymer polyacrylamide laboratory detection.
Second, the basic principle
The basic principle of polymer polyacrylamide laboratory detection is to evaluate the quality and applicability of polyacrylamide by analyzing the content and properties of polyacrylamide in a sample. Commonly used principles include mass fraction method, solubility method, and structural characterization method.
3. Common methods
1.Mass fraction method.
The mass fraction method is a method of assessing the quality of polyacrylamide by determining its content in a sample. Commonly used measurement methods include spectrophotometry, infrared spectroscopy and nuclear magnetic resonance. The following table summarizes the pros and cons of each approach.
2.Solubility method.
The solubility method is a method of assessing the quality and suitability of polyacrylamide by determining its solubility in different solvents. Commonly used solvents include water, alcohols, and ketones. According to the solubility change law of polyacrylamide in different solvents, its molecular weight, structure and polymerization degree can be judged. The table below summarizes the solubility of commonly used solvents.
3.Structural characterization.
Structural characterization is a method of evaluating the quality and suitability of polyacrylamide by analyzing its molecular structure. Commonly used structural characterization methods include nuclear magnetic resonance, mass spectrometry, and gel permeation chromatography. These methods can provide information on the length, branching, and degree of cross-linking of polyacrylamide molecules. The following table summarizes the advantages and disadvantages of commonly used structural characterization methods.
Fourth, parameter evaluation
In polyacrylamide assays, in addition to determining content and structure, important parameters such as particle size, molecular weight distribution, and solubility can be evaluated. These parameters are closely related to the performance and application of polyacrylamide. Commonly used evaluation methods include laser particle size analysis, gel permeation chromatography, and swelling testing.
5. Summary
Polymer polyacrylamide laboratory detection is an important means to ensure its quality and applicability. Methods such as mass fraction method, solubility method, and structural characterization method allow for a comprehensive evaluation of polyacrylamide. In addition, parameter evaluation is also an important part of the inspection. For different applications, the appropriate detection methods and parameters are different. Through scientific analysis and evaluation, the quality and application effect of polymer polyacrylamide can be ensured.