Indomethacin Molecular Imprinted Polymer Preparation, Characterization of Application

2012 ◽  
Vol 602-604 ◽  
pp. 785-789
Author(s):  
Zhi Dou Tan
Keyword(s):  
Water Samples ◽  
Suspension Polymerization ◽  
Tap Water ◽  
Crosslinking Agent ◽  
Thermal Polymerization ◽  
Imprinted Polymer ◽  
Strong Light ◽  
Relative Standard ◽  
Aqueous Solution Polymerization

In order to indomethacin (IDM) for imprinting molecular, acrylamide (AA) as functional monomer, ethylene glycol dimethacrylate (EGDMA two) as crosslinking agent, respectively by photopolymerization and thermal polymerization of two methods of aqueous solution polymerization, suspension polymerization preparation of molecularly imprinted polymer.The polymer adsorption experiments show that the use of light-polymerized specificity is strong; light initiated polymer used for sample determination and calibration experiments, results in tap water and river water samples in Enshi Qingjiang indomethacin recoveries were 84.3% and 87.1%, were higher than 80%.Tap water and the relative standard deviation (n = 3) were 3.96%, 14.2%, that can be used for the separation and enrichment of indomethacin in water samples.

Acanthamoeba Species in Tap Water, Egypt

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Ahmad Z Al-Herrawy ◽  
Mohamed A Marouf ◽  
Mahmoud A. Gad
Keyword(s):  
Water Samples ◽  
Tap Water ◽  
Pcr Analysis ◽  
Pulmonary Infections ◽  
Clinical Syndromes ◽  
Acanthamoeba Species ◽  
Amebic Encephalitis ◽  
Acanthamoeba Culbertsoni ◽  
Autumn And Winter

Genus Acanthamoeba causes 3 clinical syndromes amebic keratitis, granulomatous amebic encephalitis and disseminated granulomatous amebic disease (eg, sinus, skin and pulmonary infections). A total of 144 tap water samples were collected from Giza governorate, Egypt. Samples were processed for detection of Acanthamoeba species using non-nutrient agar (NNA) and were incubated at 30oC. The isolates of Acanthamoeba were identified to species level based on the morphologic criteria. Molecular characterization of the Acanthamoeba isolates to genus level was performed by using PCR. The obtained results showed that the highest occurrence percentage of Acanthamoeba species in water samples was observed in summer season (38.9%), then it decreased to be 30.6% in spring and 25% in each of autumn and winter. PCR analysis showed that 100% of 43 Acanthamoeba morphologically positive samples were positive by genus specific primer. In the present study eight species of Acanthamoeba can be morphologically recognized namely Acanthamoeba triangularis, Acanthamoeba echinulata, Acanthamoeba astronyxis, Acanthamoeba comandoni, Acanthamoeba griffini, Acanthamoeba culbertsoni, Acanthamoeba quina and Acanthamoeba lenticulata. In conclusion, the most common Acanthamoeba species in tap water was Acanthamoeba comandoni

scholarly journals Synthesis and characterization of a surface-grafted Pb(ii)-imprinted polymer based on activated carbon for selective separation and pre-concentration of Pb(ii) ions from environmental water samples

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 5110-5120 ◽  
Author(s):  
Zhenhua Li ◽  
Lihua Chen ◽  
Qiong Su ◽  
Lan Wu ◽  
Xiaohong Wei ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Human Body ◽  
Water Samples ◽  
Concentration Level ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Synthesis And Characterization ◽  
High Toxicity ◽  
Imprinted Polymer

Even the lowest concentration level of lead (Pb) in the human body is dangerous to health due to its bioaccumulation and high toxicity.

Synthesis, Characterization and Selective Recognition of Lead Using a New Ion Imprinted Polymer Material

2011 ◽  
Vol 306-307 ◽  
pp. 688-691 ◽  
Author(s):  
Hai Yan Zhuang ◽  
Hui Zhi Li ◽  
Yang Xue
Keyword(s):  
Crosslinking Agent ◽  
Absorption Spectrometry ◽  
Lead Ion ◽  
Binary Complex ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Ion Imprinted

A new ion-imprinted polymer (IIP) material was synthesized by copolymerization of 4-vinylpyridine(VP) as monomer, ethylene glycol dimethacrylate(EGDMA) as crosslinking agent and 2,2΄-azobisisobutyronitrile(AIBN) as initiator in the presence of Pb–1,5-diphenylcarbazone(Pb-DHCB) complex. Blank non-imprinted polymer (NIP) were prepared under identical conditions without the use of lead imprint ion. The synthesized polymers were characterized by IR spectroscopy and elemental analyzer techniques. Of the several polymers synthesized, only the imprinted polymer formed with binary complex of Pb2+–DHCB showed quantitative enrichment of lead ion from aqueous solution. The relative standard deviation of the five replicate determinations of Pb (II) was3.26%. The detection limit for 150 mL of sample was 1.6 µg L-1 using flame atomic absorption spectrometry. The developed method was successfully applied to the determination of trace lead in environmental samples with satisfactory results.

Preparation of Cu2+ Imprinted Polymer Microspheres and its Application for the Determination of Cu2+ in Water

2013 ◽  
Vol 389 ◽  
pp. 7-11 ◽  
Author(s):  
Yong Feng Kang ◽  
Hua Jin Shi ◽  
Lin Ge Yang ◽  
Jun Xia Kang ◽  
Zi Qi Zhao
Keyword(s):  
Water Samples ◽  
Tap Water ◽  
Absorption Spectrometry ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Surface Molecular Imprinting ◽  
Mixed Aqueous Solution ◽  
Ion Imprinted ◽  
Surface Molecular Imprinting Technique

Copper (II) imprinted polymer particles were prepared by surface molecular imprinting technique in toluenewith 1-hy-droxy-4-(prop-2-enyloxy)-9, 10-anthraquinone (AQ) as the functional monomer, silica gel as the carrier.The effect of adsorption time, acidity, temperature and concentration on adsorption capacity was investigated by atomic absorption spectrometry. Selectivity for Cu2+ of the prepared polymer was also studied in mixed aqueous solution, the ion imprinted polymer were applied to the determination of Cu2+ in river and tap water samples, the concentration of Cu2+ in water samples were determined and the recoveries of Cu2+ in river and tap water samples were 110.7% and 109.2%, respectively.

Synthesis and characterization of Hg(ii)-ion-imprinted polymer and its application for the determination of mercury in water samples

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67365-67371 ◽  
Author(s):  
Fengxian Luo ◽  
Shuiying Huang ◽  
Xiaodong Xiong ◽  
Xiaoqi Lai
Keyword(s):  
Water Samples ◽  
Synthesis And Characterization ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Selective Determination ◽  
Ion Imprinted

Hg(ii)-ion-imprinted polymer for the sensitive and selective determination of mercury in water samples.

Determination of Trace Amounts of Lead Using the Flotation-spectrophotometric method

2011 ◽  
Vol 6 ◽  
pp. ACI.S5948b
Author(s):  
Sabah Shiri ◽  
Ali Delpisheh ◽  
Ali Haeri ◽  
Abdolhossein Poornajaf ◽  
Babak Golzadeh ◽  
...  
Keyword(s):  
Water Samples ◽  
Sea Water ◽  
Tap Water ◽  
Molar Absorptivity ◽  
Alizarin Yellow ◽  
Low Concentrations ◽  
Relative Standard ◽  
Seawater Samples ◽  
Almost All

The present study describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of extremely low concentrations of lead. It is based on flotation of a complex of Pb2+ ions and Alizarin yellow between aqueous and n-hexane interface at pH = 6. The proposed procedure is also applied for determination of lead in both tap water and prepared sea water samples. Beer's Law was obeyed over the concentration range of 3.86 × 10-8 To 8.20 × 10-7 molL-1 (8-170 ngmL-1) with an apparent molar absorptivity of 1.33 × 106 molL-1 cm-1 for a 100 mL aliquot of the water sample. The detection limit (n = 10) was 8.7 × 10-9 molL-1 (1.0 ngmL-1) and the Relative standard deviation (R.S.D), (n = 10) for 7.2 × 10-7 molL-1 (150 ngmL-1) of Pb (II) was 4.36%. A notable advantage of the method is that the determination of Pb (II) is free from the interference of almost all cations and ions found in the environment and waste water samples. The determination of Pb (II) in tap and synthetic seawater samples was also carried out by the present method. The results were satisfactorily comparable so that the applicability of the proposed method was confirmed to the real samples.

Synthesis and Characterization of Crosslinking Etherification Bagasse Xylan

2014 ◽  
Vol 960-961 ◽  
pp. 204-207 ◽  
Author(s):  
Zu Tie Luo ◽  
He Ping Li
Keyword(s):  
Crosslinking Agent ◽  
Chloroacetic Acid ◽  
Water Soluble ◽  
Molar Ratio ◽  
Ir Spectrometry ◽  
Enormous Amount ◽  
Aqueous Solution Polymerization ◽  
One Year ◽  
Polymerization Method

The bagasse xylan is a polysaccharide that occurs in nature in enormous amount in various one year-and perennial plants. Versatile ways to generate bio-based functional polymers result from the chemical modification of this biopolymer. The crosslinking etherification bagasse xylan (CEBX) has been synthesized by using aqueous solution polymerization method. It implies the use of sodium hydroxide, chloroacetic acid as a carboxymethylating agent and epichlorohydrin as crosslinking agent. The DS values of Carboxymethylated xylan up to 0.59 can be controlled by adjusting the molar ratio in a two step syntheses. Crosslinking etherification bagasse xylan are water soluble at a DS of 0.3. The result showed that the final product had excellent surface activity. IR spectrometry were applied to characterize the carboxymethyl xylans in detail, and revealed characteristic absorption peaks at 1600, 1426 and 1324cm−1.

scholarly journals A Fluorimetric Method Based on an Imidazole Compound for Cu2+ Determination in Tap Water

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Zafer Ocak
Keyword(s):  
Standard Deviation ◽  
Water Samples ◽  
Fluorescence Spectra ◽  
Tap Water ◽  
External Calibration ◽  
Relative Standard ◽  
Sensor Properties ◽  
Detection And Quantification ◽  
Imidazole Compound

Ion sensor properties of 4-(1-(4-hydroxy-3-methoxybenzyl)-1H-benzo[d]imidazol-2-yl)-2-methoxyphenol (L) in acetonitrile-water (1 : 1) were evaluated by fluorescence spectrometry. Pronounced quenching in the fluorescence spectra of the ligand was only observed for the Cu2+ ion among many metal ions. Linear fluorescence responses of the ligand at 360 nm as the function of the Cu2+ concentration were used for the determination of the Cu2+ ion in spiked tap water samples. Recovery values (R%) were satisfactory, and relative standard deviation (RSD%) was below 5.00 in intraday and interday measurements. Detection and quantification limits were 0.28 and 0.84 μg/L, respectively. The assay based on external calibration only took a few minutes.

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