thin layer chromatography Articles

  • Nitrite interference and elimination in diphenylcarbazide (DPCI) spectrophotometric determination of hexavalent chromium

    Cr(VI) is highly noted as a carcinogenic, mutagenic, and teratogenic pollutant. However, accurate determination of Cr(VI) in aqueous samples is difficult using the conventional diphenylcarbazide (DPCI) spectrophotometric method upon being interfered by co-existed nitrite. This paper illustrates how to eliminate the nitrite influence in a simple but efficient method based on a detailed analysis ...


    By IWA Publishing

  • Development of a highly sensitive assay for enzyme‐mediated reductive degradation of polychlorinated dibenzo‐p‐dioxin

    The degradation of 2‐chloro‐4,5‐O‐(4′‐methyl‐7′, 8′‐diphenyl)ether (CMDPE), an analog of 2,7‐dichlorodibenzo‐p‐dioxin (2,7‐DCDD), mediated by Geobacillus sp. UZO 3 cell‐free extract was monitored. Ethyl acetate extracts of a complete reaction mixture incubated at 65°C for 18 h were analyzed either by thin layer chromatography (TLC) fractionation coupled with spectrometric detection or by gas ...


    By John Wiley & Sons, Ltd.

  • Novel Separations by a Charged NF/UF Membrane

    Introduction Separation characteristics of a novel, thin-layer composite (TLC®) membrane bearing an anionic surface charge are elucidated using three distinct approaches. These include solute challenges to demonstrate apparent molecular weight cut-off (MWCO), affinity chromatography to demonstrate surface force interactions between solute and membrane, and pilot scale operations using industrial ...


  • Yes, You Can Pick the Right TLC Plate – Part I

    “I’d like a box of TLC plates, please.” Sounds innocent enough, right? But when you have more than 500 plate options, things get a whole lot trickier. How do you dig through the layers (pun intended) to get the plates you need? TLC plates come in lots of fun forms and sizes—at least we think they’re fun! You can differentiate TLC plates by: Adsorbent material ...


    By iChromatography/Analtech

  • Biosurfactant produced by a Rhodococcus erythropolis mutant as an oil spill response agent

    Biosurfactants have been considered as superior alternatives to currently used surfactants as they are generally more biodegradable, less toxic, and better at enhancing biodegradation. However, the application of biosurfactants is limited by the availability of economic biosurfactants and the corresponding producers that can work effectively. Hyperproducers generated by metabolic engineering ...


    By IWA Publishing

  • Phenol Degradation by Immobilized Cells of Arthrobacter citreus

    AbstractAn aerobic microorganism with an ability to utilize phenol as carbon and energy source was isolated from a hydrocarbon contamination site by employing selective enrichment culture technique. The isolate was identified as Arthrobacter citreus based on morphological, physiological and biochemical tests. This mesophilic organism showed optimal growth at 25°C and at pH of 7.0. The phenol ...


  • Lipid profile characterization of wastewaters from different origins

    Lipids in wastewaters are potential raw material for renewable diesel, but may complicate biological treatment of wastewaters. The lipid composition of palm oil mill effluent (POME), chemithermomechanical pulp mill (CTMP) wastewater and municipal wastewater (MWW) was studied with a combination of thin-layer chromatography and nuclear magnetic resonance. Gravimetrically determined content of ...


    By IWA Publishing

  • Photostability and photodegradation pathways of distinctive pesticides

    Transformation of pesticides in the environment is a highly complex process affected by different factors. Biological and physical-chemical factors may play a role in the degradation to variable extent. Photodecomposition might be regarded as one of the most crucial factors affecting the fate of pesticides. Therefore, our study focused on revealing specific details of the photolytic degradation ...

  • Practical Characterization of NF/UF Membranes

    Introduction Membrane separations in the ultrafiltration (UF) and especially the nanofiltration (NF) regions of the filtration spectrum are governed by a complex combination of both steric exclusion and surface force interactions. UF and NF membranes bearing formal surface charges display unusual selectivity behavior not predicted on the basis of physical pore size alone. Therefore, practical ...

  • DDT increases hepatic testosterone metabolism in rats

    DDT and its metabolites are considered as endocrine disruptors able to promote hormone-dependent pathologies. We studied the effects of technical-grade DDT on hepatic testosterone metabolism and testosterone hydroxylase activity ratios in the rat. Male and female Wistar rats were treated by gavage with a single dose of technical-grade DDT (0, 0.1, 1, 10, and 100 mg/kg body weight) and killed 24 h ...


    By Springer

  • Application of novel consortium TSR for treatment of industrial dye manufacturing effluent with concurrent removal of ADMI, COD, heavy metals and toxicity

    The present study was aimed towards the effective bio-treatment of actual industrial effluent containing as high as 42,000 mg/L COD (chemical oxygen demand), >28,000 ADMI (American Dye Manufacturers Institute) color value and four heavy metals using indigenous developed bacterial consortium TSR. Mineral salt medium supplemented with as low as 0.02% (w/v) yeast extract and glucose ...


    By IWA Publishing

  • Effects of Surface Force Interactions on an NF/UF Membrane

    Summary Appreciation of a membrane's surface chemistry and steric exclusion character is needed to truly understand and predict membrane performance for specific industrial separations. The interpreter of membrane characterization data must consider both factors in the assessment of separation potential. The test conditions employed will strongly influence the separation data outcome, as will ...


  • Development of advanced Raman spectroscopy methods and databases for the evaluation of trace evidence and the examination of questioned documents - Phase II

    Abstract: Researchers from the City University of New York, West Virginia University, the New York Police Department Crime Lab, and The Metropolitan Museum of Art have formed a multidisciplinary collaboration to further the application of Raman spectroscopy and non-destructive surface-enhanced Raman scattering (SERS) analysis techniques as applied to the evaluation of trace evidence ...


    By AcuTech Scientific Inc.

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