Inorganic Solid Purification
Inorganic Solid Purification - Related Videos
10:20
Quantification of Heavy Metals and Other Inorganic Contaminants on the Productivity of Microalgae
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Cited by 14 •
2015
Integration of microalgal cultivation with industrial flue gas will ultimately introduce heavy metals and other inorganic compounds into the growth media. This study presents a procedure used to determine the end fate and impact of heavy metals and inorganic contaminants on the growth of Nannochloropsis salina grown in photobioreactors.
05:39
Purification of Ferrocene by Sublimation
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2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University Sublimation, the direct phase transition of a solid into a gas without first becoming a liquid, takes place at temperatures and pressures lower than that of the compound's triple point (Figure 1).The process of sublimation can be utilized to purify both organic and inorganic solids. During the purification technique, a solid is heated directly into the gas-phase. All non-volatile impurities are left behind while the...
03:16
An Assay for the Quantification of Inorganic Polyphosphate in Bacteria
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2025
Source: Pokhrel, A., et al. Assaying for Inorganic Polyphosphate in Bacteria. J. Vis. Exp. (2019).This video demonstrates a colorimetric assay to measure inorganic polyphosphate (polyP) in bacterial samples. The procedure involves enzymatically converting polyP into free phosphate, which then reacts with molybdate and ascorbic acid to produce a blue-colored complex. By comparing the absorbance of this complex to a standard curve of known phosphate concentrations, the polyP content in bacterial...
11:06
Fabrication of Fully Solution Processed Inorganic Nanocrystal Photovoltaic Devices
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Cited by 4 •
2016
This protocol describes the synthesis and solution deposition of inorganic nanocrystals layer by layer to produce thin film electronics on non-conductive surfaces. Solvent-stabilized inks can produce complete photovoltaic devices on glass substrates via spin and spray coating following post-deposition ligand exchange and sintering.
08:21
Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
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Cited by 12 •
2017
The usefulness of an analytical method to determine inorganic arsenic in a wide range of food matrices is demonstrated. The method consists of selective extraction of inorganic arsenic into chloroform with a final determination by hydride generation-atomic absorption spectrometry.
FAQs
Solvent choice and temperature determine whether recrystallization can separate a desired inorganic solid from dissolved impurities. By exploiting differences in solubility, the process can favor formation of crystals with more defined composition while keeping some contaminants in the remaining phase. Adjusting these conditions helps balance purity against product loss, especially when the material has limited solubility or variable behavior.
The relevant property difference determines which purification route is most appropriate. Solubility differences support recrystallization or precipitation, whereas volatility or melting behavior can support sublimation or thermal treatment. Particle-size differences make filtration useful, and chemical reactivity can provide another separation basis. Matching the method to the impurity and product prevents applying a process that offers little selectivity.
Temperature and atmosphere influence both separation efficiency and material stability. Heating can exploit melting behavior or volatility, but uncontrolled conditions may promote product loss or decomposition. An appropriate atmosphere helps maintain the intended chemical state during treatment. These variables therefore require deliberate control, particularly when purification is paired with thermal processing of a crystalline or particulate solid.
A practical workflow begins by identifying the property contrast between the target solid and its impurities, then selecting recrystallization, precipitation, sublimation, filtration, or thermal treatment accordingly. The chosen conditions are set through solvent choice, temperature, and atmosphere, followed by phase separation. This sequence links the chemical basis of purification to a recoverable solid with improved composition.
In analytical chemistry, purification helps produce an inorganic material whose composition is sufficiently defined for reliable characterization. In solid-state synthesis, the same control supports interpretation of the prepared phase rather than an impurity mixture. The approach is useful when reproducibility matters, because residual contaminants can change measured or observed behavior and make results harder to compare.
Trace contaminants are especially consequential in catalysis, ceramics, and electronic materials. Even small compositional differences can alter structure, reactivity, conductivity, or reproducibility, so purification is not merely a cosmetic improvement. Selecting conditions that remove impurities without excessive product loss or decomposition helps preserve the performance characteristics expected from the final inorganic material.