Selective Determination of Trace Mercury (II) after Preconcentration with 4-(2-Pyridylazo)-Resorcinol-Modified Nanometer-Sized SiO2 Particles from Sample Solutions

Zhai, Yunhui; Chang, Xijun; Cui, Yuemei; Lian, Ning; Lai, Shoujun; Zhen, Hong; He, Qun

doi:10.1007/s00604-006-0488-y

Cited by 71 publications

(32 citation statements)

References 31 publications

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“…For this purpose, different separation/preconcentration methods, such as membrane filtration, solvent extraction, solid phase extraction (SPE), ion exchange, cloud point extraction, liquid-liquid extraction, co-precipitation, etc., have been widely used in order to solve this analytical problem [6,8]. Among these, SPE, based on the sorption of solute by different kinds of solid sorbents, is one of the most promising techniques for the preconcentration of trace metals and the elimination of matrix interference prior to analysis [12][13][14]. This technique is attractive since there is no need to use organic solvents, which may cause potential toxic effects.…”

Section: Introductionmentioning

confidence: 99%

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Anılan

Gedikbey

Akar³

2010

CLEAN Soil Air Water

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This work describes the modification of silica gel with dimethylglyoxime, in order to prepare an effective sorbent for the preconcentration and determination of copper. The sorption capacity of dimethylglyoxime-modified silica-gel (DMGMS) was 71.37 mg g -1 and the optimum pH for the quantitative recovery of copper was found to be 5.0. The optimum flow rate, sorbent amount, and sample volume were 1 mL min -1 , 300 mg, and 50 mL, respectively. 10 mL of 0.1 mol L -1 HCl was the most suitable eluent. The detection limit of copper was 6.0 ng mL -1 . The recommended method, for the determination of copper, is simple and reliable, without any notable matrix effect and can be successfully applied to environmental water samples. Copper recovery in the range from 99 -100% was obtained from seawater and thermal spring water using this method. The method was applied to standard reference materials, NIST-1515 (apple leaves) and NIST-1643e (simulated fresh water), for the determination of copper and the results were in good agreement with certified values.

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Section: Introductionmentioning

confidence: 99%

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Anılan

Gedikbey

Akar³

2010

CLEAN Soil Air Water

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“…The choice of solid phase adsorbents is a decisive factor that affects analytical sensitivity and selectivity (Camel, 2003;Liang & Chen, 2005). As solid phase material, silica gel (Tokalıoglu, Oymak, & Kartal, 2004), activated carbon (Jiang, Wu, Liu, Xia, & Wang, 2008), Amberlite XAD resins (Sharma & Pant, 2009;Tokalıoglu, Büyükbas ß, & Kartal, 2006), naphthalene (Pancras & Puri, 2002) and nanomaterial (Zhai et al, 2006) have been widely used for preconcentration and determination of trace metal ions. There is little research for the determination by solid phase extraction of the copper and iron contents in various food samples commonly consumed in Turkey.…”

Section: Introductionmentioning

confidence: 99%

Selective determination of copper and iron in various food samples by the solid phase extraction

Tokalıoğlu

Gürbüz

2010

Food Chemistry

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“…However, a preconcentration step of mercury has to be used before detection when its level is very low [10,[15][16][17][18][19][20][21]. So, it is significant and necessary to develop new methods for the enrichment of mercury in some special samples before analysis [22][23][24][25]. Normally, the level of mercury in human saliva is low and the reports about mercury analysis in human saliva were very scarce [26,27].…”

Section: Introductionmentioning

confidence: 97%

Ultrasensitive determination of mercury in human saliva by atomic fluorescence spectrometry based on solidified floating organic drop microextraction

2012

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We report on a new, rapid and simple method for the determination of ultra-trace quantities of mercury ion in human saliva. It is based on solidified floating organic drop microextraction and detection by cold vapor atomic fluorescence spectrometry (CV-AFS). Mercury ion was complexed with diethyldithiocarbamate, and the hydrophobic complex was then extracted into fine droplets of 1-undecanol. By cooling in an ice bath after extraction, the droplets in solution solidify to form a single ball floating on the surface of solution. The solidified microdrop containing the mercury complex was then transferred for determination by CV-AFS. The effects of pH value, concentration of chelating reagent, quantity of 1-undecanol, sample volume, equilibration temperature and time were investigated. Under the optimum conditions, the preconcentration of a 25-mL sample is accomplished with an enrichment factor of 182. The limit of detection (3σ) is 2.5 ng L −1 . The relative standard deviation for seven replicate determinations at 0.

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Selective Determination of Trace Mercury (II) after Preconcentration with 4-(2-Pyridylazo)-Resorcinol-Modified Nanometer-Sized SiO2 Particles from Sample Solutions

Cited by 71 publications

References 31 publications

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Determination of Copper in Water Samples after Solid‐phase Extraction Using Dimethylglyoxime‐modified Silica

Selective determination of copper and iron in various food samples by the solid phase extraction

Ultrasensitive determination of mercury in human saliva by atomic fluorescence spectrometry based on solidified floating organic drop microextraction

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