CuO nanoparticles with biostabilizers for the catalytic decolorization of bromocresol green, crystal violet, methyl red dyes based on H2O2 in aqueous medium

2013 ◽  
Vol 109 (2) ◽  
pp. 393-403 ◽  
Author(s):  
L. Parimala ◽  
J. Santhanalakshmi
Keyword(s):  
Aqueous Medium ◽  
Crystal Violet ◽  
Cuo Nanoparticles ◽  
Bromocresol Green ◽  
Methyl Red ◽  
Green Crystal

scholarly journals Zwitterionic superabsorbent polymer hydrogels for efficient and selective removal of organic dyes

RSC Advances ◽  
2019 ◽  
Vol 9 (32) ◽  
pp. 18565-18577 ◽  
Author(s):  
Tanzil Ur Rehman ◽  
Luqman Ali Shah ◽  
Mansoor Khan ◽  
Muhammad Irfan ◽  
Noor Saeed Khattak
Keyword(s):  
Free Radical ◽  
Aqueous Medium ◽  
Radical Polymerization ◽  
Crystal Violet ◽  
Congo Red ◽  
Organic Dyes ◽  
Selective Removal ◽  
Superabsorbent Polymer ◽  
Polymer Hydrogel ◽  
Polymer Hydrogels

A novel zwitterionic superabsorbent polymer hydrogel [ZI-SAH] was synthesized by free radical polymerization and used for the removal of crystal violet (CV) and congo red (CR) from an aqueous medium.

Determination of malachite green, crystal violet and their leuco-metabolites in fish by HPLC–VIS detection after immunoaffinity column clean-up

2013 ◽  
Vol 913-914 ◽  
pp. 123-128 ◽  
Author(s):  
Jie Xie ◽  
Tao Peng ◽  
Dong-Dong Chen ◽  
Qing-Jie Zhang ◽  
Guo-Min Wang ◽  
...  
Keyword(s):  
Malachite Green ◽  
Crystal Violet ◽  
Immunoaffinity Column ◽  
Green Crystal

Determination of Residues of Three Triphenylmethane Dyes and Their Metabolites (Malachite Green, Leuco Malachite Green, Crystal Violet, Leuco Crystal Violet, and Brilliant Green) in Aquaculture Products by LC/MS/MS: First Action 2012.25

2013 ◽  
Vol 96 (5) ◽  
pp. 1152-1157 ◽  
Author(s):  
Dominique Hurtaud-Pessel ◽  
Pierrick Couëdor ◽  
Eric Verdon ◽  
Dawn Dowell
Keyword(s):  
Malachite Green ◽  
Crystal Violet ◽  
Brilliant Green ◽  
Triphenylmethane Dyes ◽  
Method Performance ◽  
Green Crystal ◽  
Leuco Crystal Violet ◽  
Aquaculture Products ◽  
Leuco Malachite Green

Abstract During the AOAC Annual Meeting held from September 30 to October 3, 2012 in Las Vegas, NV, the Expert Review Panel (ERP) on Veterinary Drug Residues reviewed data for the method for determination of residues of three triphenylmethane dyes and their metabolites (malachite green, leuco malachite green, crystal violet, leuco crystal violet, and brilliant green) in aquaculture products by LC/MS/MS, previously published in the Journal of Chromatography A 1218, 1632–1645 (2006). The method data were reviewed and compared to the standard method performance requirements (SMPRs) found in SMPR 2009.001, published in AOAC's Official Methods of Analysis, 19th Ed. (2012). The ERP determined that the data were acceptable, and the method was approved AOAC Official First Action. The method uses acetonitrile to isolate the analyte from the matrix. Then determination is conducted by LC/MS/MS with positive electrospray ionization. Accuracy ranged from 100.1 to 109.8% for samples fortified at levels of 0.5, 0.75, 1.0, and 2.0 μg/kg. Precision ranged from 2.0 to 10.3% RSD for the intraday samples and 1.9 to 10.6% for the interday samples analyzed over 3 days. The described method is designed to accurately operate in the analytical range from 0.5 to 2 μg/kg, where the minimum required performance limit for laboratories has been fixed in the European Union at 2.0 μg/kg for these banned substances and their metabolites. Upper levels of concentrations (1–100 μg/kg) can be analyzed depending on the different optional calibrations used.

scholarly journals Gradient Adsorption of Methylene Blue and Crystal Violet onto Compound Microporous Silica from Aqueous Medium

ACS Omega ◽  
2020 ◽  
Vol 5 (43) ◽  
pp. 28382-28392
Author(s):  
Yong Li ◽  
Shifeng Wang ◽  
Zichen Shen ◽  
Xin Li ◽  
Qianyu Zhou ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Aqueous Medium ◽  
Crystal Violet ◽  
Microporous Silica

Photovoltaic and rectification properties of SnO2/malachite green + crystal violet dye/copper system

1984 ◽  
Vol 3 (3) ◽  
pp. 271-274 ◽  
Author(s):  
G. D. Sharma ◽  
A. K. Tripathi ◽  
S. C. Mathur ◽  
D. C. Dube
Keyword(s):  
Malachite Green ◽  
Crystal Violet ◽  
Green Crystal ◽  
Crystal Violet Dye

scholarly journals Statistical Optimization, Partial Purification, and Characterization of Phytase Produced from Talaromyces purpureogenus NSA20 Using Potato Peel Waste and its Application in Dyes De-colorization

2021 ◽  
Vol 12 (4) ◽  
pp. 4417-4431
Keyword(s):  
Crystal Violet ◽  
Specific Activity ◽  
Marine Fungus ◽  
Maximum Activity ◽  
Statistical Optimization ◽  
Partial Purification ◽  
Methyl Red ◽  
Potato Peel ◽  
Phytase Production

In this study, Talaromyces purpureogenus NSA20 as phytase-producing marine fungus was isolated and identified morphologically and genetically and deposited in Gene Bank with accession number MW031769.1. One factor at a time (OFAT) optimization was performed, where the result revealed that potato peel waste (1.5%) as a substrate was the highest for phytase production at 6 days, where the maximum activity of phytase was 138.4 U/ml. Moreover, Box–Behnken design as response surface methodology was carried out for statistical optimization of phytase production by T. purpureogenus NSA20. Statistical optimization illustrated that the optimized medium for phytase production increased 1.57 fold compared to the OFAT optimized medium. Partial purification of phytase was carried out, where the enzyme after precipitation with ammonium sulfate (80%) was 2.6-fold purified phytase, and the yield was 39.8 %., the specific activity was 31.19 U/mg proteins. Additionally, partially purified phytase was characterized; the maximum activity of phytase at Fe++ 0.1% and pH 5.5 at 37 oC was 350 U/ml. Eventually, phytase was applied for crystal violet and methyl red decolorization, where decolorization percentages of crystal violet and methyl red were 85.5% and 75% at 120 min, respectively.

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