Showing results for: UV-VIS detection Articles
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Separation of colors and scents from candle wax
Separation and detection and additives from scented candles While electric lighting has have largely replaced candles as a light source, they are still popular for decorative purposes. Originally from bees’ wax, modern candles are typically made from paraffin or stearin. Often, coloring and scents are added to candles. These additives can be separated from the candle wax by chromatography. ...
By BUCHI
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Development of a preconcentration method for indomethacin in natural waters using dispersive liquid–liquid microextraction based on solidification of floating organic drop technique
A new dispersive liquid–liquid microextraction method based on the solidification of a floating organic drop was developed for the preconcentration of indomethacin in natural waters followed by ultraviolet-visible (UV-Vis) spectrophotometric detection. 1-undecanol and ethanol were used as the extraction solvent and the disperser solvent, respectively. An investigation of the main experimental ...
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Organic Matter in Drinking Water: A Guide for Simple Online Monitoring
Control of dissolved organics has been one of the highest priority concerns for most water treatment plants for over 20 years. Organics monitoring is an even more critical issue today in the face of more stringent regulations and concerns around trace organics, emerging contaminants, and even counter-terrorism or water security. Despite the critical need, many plants still rely primarily on ...
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Use of talc as low-cost clarifier for wastewater
Talc is proposed as a low-cost mineral for wastewater clarification. In this sense, adsorption of methylene blue (MB) from aqueous solutions was studied comparatively by using sepiolite (qualified as very good adsorbent) and two talc samples with different particle size and purity degree. The MB adsorption was assessed by determining remnant dye in the supernatant using UV–vis ...
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Modification and characterization of microwave assisted N doped TiO2 – a photodegradation study under suspension and immobilized system
A commercially available TiO2 (P25) was modified to produce nitrogen (N) doped TiO2 prepared by mixing TiO2 powder with various amounts of urea as N precursor using a microwave irradiation heating technique. X-ray photoelectron spectroscopy analysis showed that N chemically bonded with TiO2 produces Ti-N. The measured band gap energy (Eg) of the modified sample was ca. 2.9 eV as detected by ...
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Automating Time-Consuming Water Quality Tests
Custom Sensors & Technology (CST) was established in 1980 and has provided process monitoring products and solutions across various industrial sectors such as petroleum, chemical, food processing, pharmaceutical, and biotherapeutics. CST is uniquely positioned to service the water quality industry with its portfolio of products and technologies. Several of its current and emerging ...
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Pulp and Paper Article: Improving Wastewater Treatment Processing with Online Monitoring
Wastewater treatment professionals in the Pulp and Paper industry face difficult challenges. Many of the manufacturing processes are heavily reliant on water, resulting in large volumes of wastewater that can contain complex mixtures of organic pollutants, solids, and other chemicals. Wastewater treatment is often necessary to meet environmental effluent discharge permit limits or comply with ...
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