Study on Separation/Enrichment of Trace Zinc Using Ternary Association Complex System

2014 ◽  
Vol 700 ◽  
pp. 245-248
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Complex System ◽  
Metal Ions ◽  
New Method ◽  
Ammonium Bromide ◽  
Optimum Conditions ◽  
Dimethyl Benzyl ◽  
Quantitative Separation ◽  
Novel Method ◽  
Dimethyl Benzyl Ammonium ◽  
Association Complex

The paper presents a novel method for the separation/enrichment of trace Zn2+ using NH4SCN –dodecyl dimethyl benzyl ammonium bromide (DDBAB)-water system.The effects of different parameters on the enrichment yield of Zn2+ have been investigated. The possible enrichment mechanism of Zn2+ was discussed.The results show that under the optimum conditions, Zn (SCN)42- produced by Zn2+ and SCN- reacts with DDBAB cation (DDBAB +) to form the water-insoluble ternary association complex of [Zn (SCN)4](DDBAB)2, so Zn2+ was enriched quantitatively.While Al3+,Mn2+,Ni2+ and Pb2+ could not be enriched. Thereby, the quantitative separation of Zn2+ from the above metal ions could be achieved.A new method for the separation/enrichment of trace zinc was established. The proposed method has been successfully applied to the separation/enrichment of trace Zn2+ in the samles of synthetic water, and the enrichment yield is 96.4%-99.5%.

Study on Flotation Separation and Determination of Mercury (II) by Sodium Bromide-Ammonium Thiocyanate-Octadecyl Trimethyl Ammonium Bromide System

2012 ◽  
Vol 554-556 ◽  
pp. 1957-1961
Author(s):  
Chang Qing Tu ◽  
Xin Rong Wen
Keyword(s):  
Metal Ions ◽  
Ammonium Thiocyanate ◽  
Sodium Bromide ◽  
New Method ◽  
Ammonium Bromide ◽  
Method Of Determination ◽  
Quantitative Separation ◽  
Solid Phases ◽  
Association Complex

The flotation separation and determination behaviours of mercury (Ⅱ) by sodium bromide -ammonium thiocyanide-octadecyl trimethyl ammonium bromide system were studied. The effects of different parameters,such as the dosages of NH4SCN and octadecyl trimethyl ammonium bromide (OTMAB),various salts and acidity etc. on the flotation yield of Hg2+have been investigated to select the experimental conditions.The results showed that in the presence of 1.0g NaBr and when the dosage of 0.1 mol/L NH4SCN was 0.50 mL and 0.01 mol/L OTMAB solution was 1.00 mL respectively, the formed water-insoluble ternary association complex of (OTMAB)2[Hg(SCN)4] floated above water phase and liquid-solid phases were formed with clear interface. In this condition, Cd2+,Mn2+,Ni2+,Co2+,Fe2+and Pb2+could not be floated and Hg2+could be floated quantitatively at pH2.0.Therefore, the quantitative separation of Hg2+from the above metal ions could be achieved. A new method of determination of trace mercury by flotation separation was established.The proposed method has been successfully applied to the determination of Hg2+in the sample of synthetic water and the flotation yield was 94.2%~97.9%.

Study on Separation/Enrichment of Copper (II) Using Microcrystalline Phenolphthalein Loaded with Cupferron

2013 ◽  
Vol 807-809 ◽  
pp. 456-460
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Metal Ions ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Quantitative Separation ◽  
Novel Method

The paper presents a novel method for the separation/enrichment of trace Cu2+ using microcrystalline phenolphthalein loaded with cupferron (Cup) prior to the determination by spectrophoto- metry. The effects of different parameters,such as the dosages of phenolphthalein and Cup and acidity on the enrichment yield of Cu2+ have been investigated to select the experimental conditions. The possible enrichment mechanism of Cu2+ was discussed.The results showed that under the optimum conditions, Cu2+ could be quantificationally adsorbed on the surface of microcrystalline phenolphthalein in the form of the chelate precipitate of Cu (Cup)2 ,while Ni2+,Zn2+,Mn2+,Fe2+ and Al3+ could not be adsorbed at all.Therefore,Cu2+ was completely separated from the above metal ions in the solution. The quantitative separation/enrichment and determination of Cu2+ in various environmental water samples was performed, and the results agreed well with those obtained by FAAS method.

Study on Separation/Enrichment of Trace Nickel in Water Samples Using Ammonium Sulfate-Dithizone-Cetyl Trimethyl Ammonium Bromide System

2014 ◽  
Vol 665 ◽  
pp. 233-236
Author(s):  
Chang Qing Tu ◽  
Xin Rong Wen
Keyword(s):  
Metal Ions ◽  
Ammonium Sulfate ◽  
Water Samples ◽  
Cetyl Trimethyl Ammonium Bromide ◽  
Ammonium Bromide ◽  
Optimum Conditions ◽  
Novel Method ◽  
Cetyl Trimethyl Ammonium

The paper presents a novel method for the separation/enrichment of trace Ni2+ using (NH4)2SO4-dithizone(H2Dz)-cetyl trimethyl ammonium bromide(CTMAB) system.The effects of different parameters on the enrichment yield of Ni2+ have been investigated. The possible enrichment mechanism of Ni2+ was discussed.The results showed that under the optimum conditions,the water-insoluble chelate of Ni(H2Dz)2 which formed by Ni2+ and H2Dz was quantificationally floated onto CTMAB foam phase.In this condition, Cd2+、Zn2+、Mn2+、Fe2+ and Co2+ could not be floated.Therefore, Ni2+ was separated completely from the above metal ions. The proposed method has been successfully applied to the separation/enrichment of Ni2+ in various water samples, and the recoveries were 94.2%～103.8%.

Study on the Spectrophotometric Determination of Trace Cadmium after Flotation Separation with Ternary Association Complex System

2011 ◽  
Vol 356-360 ◽  
pp. 1234-1237
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Complex System ◽  
Trimethyl Ammonium Chloride ◽  
Experimental Conditions ◽  
Method Of Determination ◽  
Quantitative Separation ◽  
Novel Method ◽  
Solid Phases ◽  
Trace Cadmium ◽  
Association Complex

The paper presents a novel method for the flotation separation of Cd2+with ternary association complex system prior to the determination by spectrophotometry. The effects of different parameters,such as the dosages of KI and octadecyl trimethyl ammonium chloride (OTMAC),various salts and acidity etc. on the flotation yield of Cd2+have been investigated to select the experimental conditions. The possible flotation mechanism of Cd2+was discussed.The results showed that by controlling pH2.0,in the presence of 1.0g (NH4)2SO4, when the dosage of 0.1 mol•L-1KI solution was 2.00 mL and 0.01 mol•L-1OTMAC solution was 2.00 mL respectively, the water-insoluble ternary association complex of (OTMAC)2(CdI4) which produced by Cd2+and I-,OTMAC cation (OTMAC+) floated above water phase and liquid-solid phases were formed with clear interface,while Mn2+, Ni2+,Co2+, Zn2+and Al3+could not be floated,so Cd2+was floated quantitatively at pH2.0. Thereby, the quantitative separation of Cd2+from the above metal ions could be achieved.A new method of determination of trace cadmium by flotation separation was established.The proposed method has been successfully applied to the determination of Cd2+in the sample of synthetic water and the flotation yield was 97.2%~108.7%.

Study on Determination of Trace Cobalt in Environmental Water Samples after Separation/Enrichment Using Microcrystalline Phenolphthalein Modified with 8-Hydroxyquinoline

2013 ◽  
Vol 316-317 ◽  
pp. 279-285
Author(s):  
Xin Rong Wen ◽  
Chang Qing Tu
Keyword(s):  
Metal Ions ◽  
Spectrophotometric Determination ◽  
Water Samples ◽  
Environmental Water ◽  
New Method ◽  
Environmental Water Samples ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Novel Method

The paper presents a novel method for the separation/enrichment of trace Co2+ using microcrystalline phenolphthalein modified with 8-hydroxyquinoline (HQ) prior to the determination by spectrophotometry. The effects of different parameters,such as the dosages of phenolphthalein and HQ,various salts and acidity on the enrichment yield of Co2+ have been investigated to select the experimental conditions. The possible enrichment mechanism of Co2+ was discussed.The results showed that under the optimum conditions, Co2+ could be quantificationally adsorbed on the surface of microcrystalline phenolphthalein in the form of the chelate precipitate of Co(HQ)2 ,while K+,Na+,Ca2+,Mg2+,Cd2+,Zn2+,Mn2+,Fe2+ and Al3+ could not be adsorbed at all.Therefore,Co2+ was completely separated from the above metal ions in the solution. A new method for the spectrophotometric determination of trace cobalt after separation/enrichment using microcrystalline phenolphthalein modified with 8-hydroxyquinoline was established.The proposed method has been successfully applied to the determination of Co2+ in various environmental water samples, and the results agreed well with those obtained by FAAS method.

Preparation of Dodecyl Dimethyl Benzyl Ammonium Bromide-Doped Cubic CaCO3 with Antibacterial Properties

2018 ◽  
Vol 91 (6) ◽  
pp. 920-926
Author(s):  
Yong Xie ◽  
Cun Fei Ma ◽  
Zi Yi Yang ◽  
Xiang Liu ◽  
Yang Yang Wang ◽  
...  
Keyword(s):  
Antibacterial Properties ◽  
Ammonium Bromide ◽  
Dimethyl Benzyl ◽  
Benzyl Ammonium ◽  
Dimethyl Benzyl Ammonium

Effect of Three Kinds of Biocide on the Anti-Corrosion Performance of TP304 Stainless Steel in Cooling Water

2011 ◽  
Vol 239-242 ◽  
pp. 2261-2265 ◽  
Author(s):  
Hong Hua Ge ◽  
Jie Ting Tao ◽  
Xue Min Xu ◽  
Cheng Jun Wei ◽  
Xin Jing Meng
Keyword(s):  
Stainless Steel ◽  
Sodium Hypochlorite ◽  
Pitting Corrosion ◽  
Cooling Water ◽  
Polarization Curves ◽  
Ammonium Bromide ◽  
Corrosion Performance ◽  
Dimethyl Benzyl ◽  
Benzyl Ammonium ◽  
Dimethyl Benzyl Ammonium

The influence of three kinds of biocide, sodium hypochlorite, dodecyl dimethyl benzyl ammonium bromide and isothiazolinone on the anti-corrosion performance of TP304 stainless steel in cooling water was studied by anodic passivation curves in this paper. The results showed that the sodium hypochlorite with the concentration above 10mg/L or the dodecyl dimethyl benzyl ammonium bromide with the concentration above 100mg/L may increase the pitting corrosion sensibility of the stainless steel in the cooling water, and the erosiveness of the cooling water to the stainless steel will increase as time goes by. Isothiazolinone with different concentrations did not influence the polarization curves of stainless steel, which indicated that isothiazolinone is a kind of safe biocide for stainless steel condensers.

Instrument processing with lauryl dimethyl benzyl ammonium bromide: A challenge for patient safety

2008 ◽  
Vol 36 (8) ◽  
pp. 598-601 ◽  
Author(s):  
Teresita Bello-Gonzalez ◽  
Patricia Rosales-Pantoja ◽  
A. Enrique Acosta-Gio ◽  
Jacobus H. de Waard
Keyword(s):  
Patient Safety ◽  
Ammonium Bromide ◽  
Dimethyl Benzyl ◽  
Benzyl Ammonium ◽  
Dimethyl Benzyl Ammonium ◽  
Instrument Processing

Corrosion control in the tubing steel of oil wells during matrix acidizing operations

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71384-71396 ◽  
Author(s):  
M. A. Migahed ◽  
E. G. Zaki ◽  
M. M. Shaban
Keyword(s):  
Carbon Steel ◽  
Acid Solution ◽  
Corrosion Inhibitor ◽  
Sulfamic Acid ◽  
Oil Wells ◽  
Ammonium Bromide ◽  
Corrosion Control ◽  
Matrix Acidizing ◽  
Dimethyl Benzyl ◽  
Dimethyl Benzyl Ammonium

Dodecyl dimethyl benzyl ammonium bromide (DDBAB) was used as a corrosion inhibitor for carbon steel pipelines in 8% sulfamic acid solution during matrix acidizing operations.

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