REE geochemical indicatrices of Li-F granite liquid segregation

Liankui, Wang; Huifen, Wang; Huang, Zhilong

doi:10.1007/bf03166878

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…Crown ethers (1) and crown ethers (2) were synthesized by the reaction of the dibenzo-16-c-5 hydroxy crown ether or 3,5-di-tert-butyl-dibenzo-14-c-4 dihydroxy crown ether with chloracetyl chloride, according to the procedure described previously. 13 The other reagents were of reagent or higher grade and used without further purification. Metal salts chosen for the present [Pb(NO 3 ) 2 , Cu(NO 3 ) 2 ⅐ 3H 2 O, CrCl 3 ⅐ 6H 2 O and Ni(NO 3 ) 2 ⅐ 6H 2 O] were reagent grade.…”

Section: Experimental Materialsmentioning

confidence: 99%

Synthesis and adsorption properties for metal ions of crosslinked chitosan acetate crown ethers

Tan

Wang

Peng

et al. 1999

J. Appl. Polym. Sci.

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ABSTRACT:Two novel chitosan derivatives-crosslinked chitosan dibenzo-16-c-5 acetate crown ether (CCTS-1) and crosslinked chitosan 3,5-di-tert-butyl dibenzo-14-c-4 diacetate crown ether (CCTS-2)-were synthesized by the reaction of crosslinked chitosan with dibenzo-16-c-5 chloracetate crown ether and 3,5-di-tert-butyl dibenzo-14-c-4 dichloracetate crown ether with the intent of forming polymers that could be used in hazardous waste remediation as toxic metal-binding agents in aqueous environments. Their structures were confirmed with elemental analysis, infrared spectral analysis, and X-ray diffraction analysis. In the infrared spectra of CCTS-1 and CCTS-2, the characteristic peaks of aromatic backbone vibration appeared at 1595 cm Ϫ1 and 1500 cm Ϫ1 ; the intensity of the NOH and OOH stretching vibration in the region of 3150 -3200 cm Ϫ1 decreased greatly. The X-ray diffraction analysis showed that the peak at 2 ϭ 20°decreased greatly in CCTS-1 and CCTS-2.

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Section: Experimental Materialsmentioning

confidence: 99%

Synthesis and adsorption properties for metal ions of crosslinked chitosan acetate crown ethers

Tan

Wang

Peng

et al. 1999

J. Appl. Polym. Sci.

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“…These are based on spectrophotometry, [7][8][9] high-performance liquid chromatography (HPLC) and mass spectrometry (MS), [10][11][12][13][14] gas chromatography (GC) with thermionic specific 15 and GC/MS, [16][17][18] capillary electrophoresis with electrospray-MS, 19 micellar electrokinetic chromatography, 20 thin-layer chromatography, 21 polarography, 22 enzyme linked immunosorbent assay, 23 fluorescence, 24 sequential injection analysis with fluorescence, 25 flow injection analysis with fluorescence 26,27 and roomtemperature phosphorescence. 28 In recent years, the developments of new oxidant reagents for the chemiluminescence (CL) reaction based on analytical approaches have been the subject of considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Flow-Injection Determination of Thiabendazole Fungicide in Water Samples Using a Diperiodatocuprate(III)-Sulfuric Acid-Chemiluminescence System

et al. 2016

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A limited number of FI-CL methods have been reported based on the use of the Cu(III) complex in aqueous phosphoric acid and sulfuric acid solutions for the determination of ofloxacin, levofloxacin and enrofloxacin in pharmaceutical preparations, urine and veterinary preparations with detection limits (S/N = 3) 2016 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. E-mail: yaqoob2001@hotmail.com Chemiluminescence (CL) with a flow-injection method is reported for the determination of thiabendazole (TBZ) fungicide based on its enhancement effect on diperiodatocuprate(III) (DPC)-sulfuric acid-CL system. The calibration graph was linear in the concentration range of 1 -2000 μg L -1 (R 2 = 0.9999, n = 8) with a limit of detection (S/N = 3) of 0.3 μg L -1 . The injection throughput was 160 h -1 with relative standard deviations (RSD, n = 4) of 1.1 -2.9% in the concentration range studied. The experimental variables e.g., reagents concentrations, flow rates, sample volume, and PMT voltage were optimized, and the potential interferences were investigated individually. The method was successfully applied to the determination of TBZ in water samples showing good agreement and recovery in the range of 92 ± 2.2 -108 ± 3% (n = 3) using dispersive liquid-liquid micro-extraction (DLLME). The possible CL reaction mechanism for DPC-sulfuric acid-TBZ is also discussed.Keywords Flow injection analysis, DPC, chemiluminescence, thiabendazole, water samples

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“…Sodium nitropruside is adopted as the catalyst to improve reaction rate and to intensify the blue color in Method I and Method II, which are recommended by Soil Science Society of America (SSSA) and Soil Science Society of China (SSSC), respectively [4,7]. Method III, developed by Wang and Li in China [10], the acetone was use as the catalyst. It is worthy to compare the different methods to figure out an economic and effective one; as well as to provide the comparability for previous soil NH 4 -N data obtained from these three techniques.…”

Section: Ammonium (Nhmentioning

confidence: 99%

A Comparison of Three Indophenol Blue Methods for Measuring Ammonium in Five Types of Soils in China

Gao

Yang

Liang

et al. 2013

AMR

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Three indophenol blue methods have been used to analyze ammounium-N in five typical soils in China. Method I and II, using the same catalyst of sodium nitroprusside but different quantity and types of reagents, are suggested by Soil Science Society of America (SSSA) and Soil Science Society of China (SSSC), respectively. Method III adopts acetone as the catalyst. It was shown that three methods yielded similar ammonium-N contents with each type of soil. But the use of sodium nitroprusside resulted in higher experimental sensitivity; and Method II by SSSC was recommended due to its lower cost.

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REE geochemical indicatrices of Li-F granite liquid segregation

Cited by 8 publications

References 4 publications

Synthesis and adsorption properties for metal ions of crosslinked chitosan acetate crown ethers

Synthesis and adsorption properties for metal ions of crosslinked chitosan acetate crown ethers

Flow-Injection Determination of Thiabendazole Fungicide in Water Samples Using a Diperiodatocuprate(III)-Sulfuric Acid-Chemiluminescence System

A Comparison of Three Indophenol Blue Methods for Measuring Ammonium in Five Types of Soils in China

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