Ultra-trace determination of silver nanoparticles in water samples using cloud point extraction and ETAAS

2013 ◽  
Vol 28 (4) ◽  
pp. 567 ◽  
Author(s):  
Georg Hartmann ◽  
Christine Hutterer ◽  
Michael Schuster
Keyword(s):  
Silver Nanoparticles ◽  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Trace Determination ◽  
Ultra Trace

Determination of very low amounts of free copper and nickel ions in beverages and water samples using cloud point extraction assisted by silver nanoparticles

2015 ◽  
Vol 7 (9) ◽  
pp. 3786-3792 ◽  
Author(s):  
Ignacio López-García ◽  
Yesica Vicente-Martínez ◽  
Manuel Hernández-Córdoba
Keyword(s):  
Silver Nanoparticles ◽  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Rich Phase ◽  
Nickel Ions

Silver nanoparticles act as carriers in the transfer of copper and nickel ions to the surfactant-rich phase obtained in a CPE process.

Determination of ultra-trace cobalt in water samples by graphite furnace atomic absorption spectrometry after cloud point extraction using 2-(5-bromo-2-pyridylazo)-5-dimethylaminoaniline as the chelating agent

2015 ◽  
Vol 7 (20) ◽  
pp. 8931-8935 ◽  
Author(s):  
Quan Han ◽  
Yanyan Huo ◽  
Longhu Yang ◽  
Tiantian Hao ◽  
Xiaohui Yang ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Cloud Point ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Graphite Furnace Atomic Absorption ◽  
Ultra Trace

A new method for the determination of ultra-trace cobalt in water samples by graphite furnace atomic absorption spectrometry after cloud point extraction was established.

Optimization of an analytical method for the spectrophotometric determination of copper in tea and water samples after ultrasonic assisted cloud point extraction using a benzothiazole fluorescein derivative complexing agent

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65321-65327 ◽  
Author(s):  
Chunlei Fan ◽  
Shengxu Luo ◽  
Rong Liu
Keyword(s):  
Cloud Point ◽  
Spectrophotometric Determination ◽  
Water Samples ◽  
Analytical Method ◽  
Cloud Point Extraction ◽  
Complexing Agent ◽  
Ultrasonic Assisted ◽  
Determination Of Copper

BTF is exists with spirolactone species with adding Cu2+, which leads to the absorbance intensity is decreased gradually and the decrease of the absorbance value is linear for Cu2+.

scholarly journals Determination of ultra-trace levels of palladium in water samples by cloud point extraction and graphite furnace atomic absorption spectrometry

2021 ◽  
pp. 174751982110273
Author(s):  
Quan Han ◽  
Yanyan Huo ◽  
Xiaohui Yang ◽  
Xing Yao
Keyword(s):  
Water Samples ◽  
Cloud Point Extraction ◽  
Graphite Furnace ◽  
Chelating Agent ◽  
Absorption Spectrometry ◽  
Graphite Furnace Atomic Absorption ◽  
Ultra Trace ◽  
Triton X ◽  
Optimized Conditions

A highly sensitive method for the determination of ultra-trace levels of palladium in water samples by cloud point extraction and graphite furnace atomic absorption spectrometry is developed. The procedure is based on complexation of palladium with a laboratory-prepared novel chelating agent, 2-(5-bromo-4-methyl-2-pyridylazo)-5-dimethylaminoaniline (5-Br-4-CH3-PADMA) and subsequent micelle-mediated extraction of the product using the non-ionic surfactant octylphenoxypolyethoxyethanol (Triton X-114) as an extracting agent. Analytical parameters affecting the separation and detection process, such as pH, concentration of the chelating agent and surfactant, equilibration temperature, and time are investigated. The optimized conditions are as follows: pH 6.0 HAc–NaAc buffer solution, 1 × 10−5 mol L−1 5-Br-4-CH3-PADMA, and 0.1% (w/v) Triton X-114. Under the optimized conditions, the calibration graph is linear in the range of 0.1–12 ng/mL, the detection limit is 0.05 ng/mL for palladium, and the relative standard deviation is 2.9% ( c = 1.0 ng/mL, n = 10). The enrichment factor, defined as the ratio of the aqueous solution volume to that of the surfactant-rich phase volume after dilution with HNO3–methanol solution, is 200. The proposed method is applied to the determination of palladium in water samples with satisfactory results.

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