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- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/10%3A_Spectroscopic_Methods/10.09%3A_ProblemsThe document appears to be focused on various analytical chemistry problems involving spectrophotometry, colorimetry, and molecular absorption techniques in different contexts such as determining conc...The document appears to be focused on various analytical chemistry problems involving spectrophotometry, colorimetry, and molecular absorption techniques in different contexts such as determining concentrations of elements or compounds in different scenarios like solutions, beverages, and solid matrices. The problems cover applications of Beer???s Law, stoichiometry of complex formation, and effects of instrumental limitations.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/34%3A_Particle_Size_Determination/34.01%3A_OverviewParticles come in many forms. Some are very small, such as nanoparticles with dimensions of 1-100 nm and that might consist of just a few hundred atoms, and some are much larger. In this chapter we co...Particles come in many forms. Some are very small, such as nanoparticles with dimensions of 1-100 nm and that might consist of just a few hundred atoms, and some are much larger. In this chapter we consider methods for determining the size of particles.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/10%3A_Spectroscopic_Methods/10.08%3A_Spectroscopy_Based_on_ScatteringThis page explains the scattering of light, focusing on why the sky appears blue and sunsets look red based on light's wavelength and atmospheric particles. Elastic scattering is discussed, with two t...This page explains the scattering of light, focusing on why the sky appears blue and sunsets look red based on light's wavelength and atmospheric particles. Elastic scattering is discussed, with two types: Rayleigh and large-particle scattering. Turbidimetry and nephelometry, techniques that measure scattered radiation, are compared. The choice between them depends on particle concentration and size. Applications include water clarity and cation/anion determination.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/34%3A_Particle_Size_DeterminationA typical packed column used porous silica particles with a mean diameter between 3-10 µm in size. A column that a manufacturer advertises as using 5 µm particles, however, will contain particles that...A typical packed column used porous silica particles with a mean diameter between 3-10 µm in size. A column that a manufacturer advertises as using 5 µm particles, however, will contain particles that are smaller and particles that are larger. As the size of the particles has an effect on the pressure it takes to move the mobile phase through the column, knowledge of the distribution of particle sizes is of interest. In this chapter we consider different methods for determining particle size.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/15%3A_Water/15.11%3A_ColloidsThis page explains colloids as heterogeneous mixtures with particle sizes between solutions and suspensions, highlighting the Tyndall effect, which involves light scattering. Unlike suspensions, collo...This page explains colloids as heterogeneous mixtures with particle sizes between solutions and suspensions, highlighting the Tyndall effect, which involves light scattering. Unlike suspensions, colloidal particles do not settle or separate by filtration. It also describes emulsions, a type of colloid that requires an emulsifying agent for stability, with examples like mayonnaise and soap that help mix nonpolar and polar substances.
