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Cloud point extraction

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Spectrophotometric determination of carmoisine after cloud point extraction using Triton X-114

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Spectrophotometric determination of carmoisine after cloud point extraction using Triton X-114. In this work, a sensitive and simple method was developed for the determination of carmoisine based on cloud point extraction.. To obtain the optimum conditions for the extraction efficiency of carmoisine, the effects of different analytical parameters such as H 2 SO 4 concentration, concentration of Triton X-114, and equilibrium temperature were studied.

Ứng dụng kỹ thuật chiết điểm mù để xác định hàm lượng sắt trong mẫu nước bằng phương pháp quang phổ

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The main factors that influence the efficiency of cloud point extraction such as the pH of sample solution;. Keywords: Cloud point extraction, spectrophotometric method, Triton X-100, Total iron.. Hiện nay, việc xác định hàm lƣợng vết của các ion kim loại là một trong những vấn đế lớn trong phân tích hóa học.

Preconcentration of rifampicin prior to its efficient spectroscopic determination in the wastewater samples based on a nonionic surfactant

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Simultaneous spectrophotometric determination of trace amount of malachite green and crystal violet in water after cloud point extraction using partial least squares regression. doi: 10.1016/j.jhazmat . The application of cloud point preconcentration for the determination of Cu in real samples by flame atomic absorption spectrometry. doi: 10.1016/S0026-265X(01)00113-8.

Magnetic solid-phase extraction based on Coriolus versicolor-immobilized γ-Fe2O3 nanoparticles for preconcentration and determination of Al(III) in water and food samples

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The complexation before spectroflu- orimetric determination [2], deep eutectic solvent-based microextraction method before electrothermal atomic absorption spectrometry (ET-AAS) [3], vortex-assisted ionic liquid-based dispersive liquid-liquid microextrac- tion prior to atomic absorption spectrometry (AAS) [11], multivariate optimization of dual-bed solid phase extraction (SPE) prior to ICP-OES [12], use of pentahydroxy flavones as a complexing reagent, cloud point extraction before spectrofluorimetric

Ultrasound assisted supramolecular liquid phase microextraction procedure for Sudan I at trace level in environmental samples

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A novel fiber optic spectrophotometric determination of nitrite using Safranin O and cloud point extraction. Journal of Hazardous Materials 2008. Asian Journal of Chemistry 2001. Implementation of a spraying-assisted fine droplet formation-based simultaneous liquid-phase microextraction method for the determination of copper in clove extract samples. A cloud point extraction approach using Triton X-100 for the separation and preconcentration of Sudan dyes in chilli powder.

Multiple objective optimization of air assisted liquid-liquid microextraction combined with solidified floating organic drop microextraction for simultaneous determination of trace copper and nickel

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The preconcentration and determination of metal ions in aqueous solutions have been evaluated by several techniques such as solid phase extraction (SPE), liquid-liquid extraction (LLE) and micelle mediated cloud point extraction (CPE) [7,8]. ME is divided into two categories due to the types of the extraction media as solid phase microextraction (SPME) [12,13] and liquid-liquid microextraction (LLME) [14–16]..

A simple and efficient approach for preconcentration of some heavy metals in cosmetic products before their determinations by flame atomic absorption spectrometry

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Abstract: In the current study, a simple and efficient analytical method for preconcentration and determination of Cd(II), Pb(II), and Sn(II) in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic absorption spectrometry, was developed.

Ultrasound-assisted emulsification–solidified floating organic drop microextraction combined with flow injection–flame atomic absorption spectrometry for the determination of palladium in water samples

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(LLE), 7,8 solid phase extraction (SPE), 9,10 cloud point extraction (CPE), 11,12 and liquid-phase microextraction (LPME) 13 − 18 have een applied for the separation and preconcentration of palladium prior to its determination by atomic spectrometry..

Latest trends, green aspects, and innovations in liquid-phase–based microextraction techniques: a review

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A number of sample preparation methods have been used for the separation and preconcentration of trace analytes, such as liquid–liquid extraction (LLE), solid phase extraction (SPE), co-precipitation, and cloud point extraction (CPE). 15 The most significant advantage of these methods is that almost all of the microliter volumes of the organic extraction phase can be introduced into the detection systems while only limited volume of the concentrated solvent is introduced in conventional preconcentration

Chromium redox speciation in food samples

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Using the cloud point extraction procedure, chromium species were transferred to the surfactant phase of Triton X-114 in the presence of silver nanoparticles (AgNPs). The analytical signal after injection of the surfactant-rich phase to ETAAS was due to total chromium content. The extreme sensitivity of the proposed procedure was reported with a LOD of 2 ng/L and an enrichment factor of 1150.

Development of a method for the determination of cadmium levels in seawater by flame atomic absorption spectrometry using an online cloud-point extraction system

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These methods are mainly based on coprecipitation, liquid–liquid extraction, solid-phase extraction, and cloud-point extraction 8 − 14 Compared to other techniques, cloud-point extraction offers many advantages, including high frequency rates, simplicity, high enrichment factors, easy automation, low cost, and reduced use of reagents.

An application of coacervate-based extraction for the separation and preconcentration of cadmium, lead, and nickel ions prior to their determination by flame atomic absorption spectrometry in various water samples

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Cloud point extraction (CPE) is one of the most popular coacervate-based extraction techniques. Formation of micellar aggregates in aqueous solutions of nonionic surfactants lies at the basis of the CPE technique.

Điểm đông đặc – Pour point

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Pour point thường thấp hơn điểm vẫn đục (cloud point) từ 4.5-5.5oC nhưng cũng khi tới 8-11oC tùy loại nhiên liệu. Mặc dù nhiên liệu, đặc biệt là nhiên liệu có chứa nhiều sáp vẫn có thể chảy được ở nhiệt độ thấp hơn điểm đông đặc trong một vài trường hợp song điểm đông đặc vẫn là nhiệt độ thấp nhất mà nhiên liệu có thể sử dụng được.

Điểm đông đặc – Pour point

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Pour point thường thấp hơn điểm vẫn đục (cloud point) từ 4.5-5.5oC nhưng cũng khi tới 8-11oC tùy loại nhiên liệu. Mặc dù nhiên liệu, đặc biệt là nhiên liệu có chứa nhiều sáp vẫn có thể chảy được ở nhiệt độ thấp hơn điểm đông đặc trong một vài trường hợp song điểm đông đặc vẫn là nhiệt độ thấp nhất mà nhiên liệu có thể sử dụng được.

Solid-phase extraction method for preconcentration of cadmium and lead in environmental samples using multiwalled carbon nanotubes

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Recently, the development of various methods for the separation and enrichment of trace levels of Cd 2+. and Pb 2+ was reported in the literature, such as solid-phase, 7 − 9 dispersive liquid-liquid, 10 − 13 and single- drop 14 − 16 microextractions and cloud point 17 − 19 extraction and coprecipitation.

Phân vùng đối tượng trên point cloud data.

000000296170-tt.pdf

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1 TÓM TẮT LUẬN VĂN THẠC SĨ Đề tài: Phân vùng đối tượng trên point cloud data Tác giả luận văn: Nguyễn Ngọc Ánh Khóa: 2012B Người hướng dẫn: TS. Ngô Lam Trung Nội dung tóm tắt: a) Lý do chọn đề tài Trước đây các cảm biến về xử lý ảnh 3D chưa phổ biến, chi phí cho các thiết bị cảm biến này rất đắt nên việc nghiên cứu và phạm vi sử dụng của chúng là rất giới hạn.

A systematic mapping study on cloud - based mobile application testing

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The data extraction form was designed to contain the following information: Study ID, Date of the Extraction, Paper Title, Author(s), Publication Type/ Year, Source, Study Context, App Type, Concept(s) addressed, Area of focus, Output, Limitation of the Approach, and Answers to the Research Questions.. Results of the pilot search. 10 Results of the Pilot Search.

Báo cáo đề tài CLOUD COMPUTING CLOUD COMPUTING

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Tổng quan về Cloud Computing. Mô hình tổng quan. Đặc điểm của cloud computing. Hiện thực của Cloud Computing. Hiện thực cloud computing. Market oriented Cloud computing. So sánh giữa Cloud Computing và Grid Computing. 30 1 CLOUD COMPUTING Chương 1. Tổng quan về Cloud Computing I.

Extraction techniques in analytical science

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In the open (atmospheric) MAE system (Figure 8.5), the sample is located in an ‘open vessel’ to which an appropriate organic solvent is added. temperatures up to the boiling point of the solvent;

Cloud computing và OpenStack Giới thiệu Cloud computing và triển khai trên OpenStack Cloud computing và OpenStack

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Cloud computing và OpenStack Giới thiệu Cloud computing và triển khai trên OpenStack Thực hiện: Lê Minh Chí Nguyễn Sơn Tùng Tháng 4/2012 Page 1 Cloud computing và OpenStack Contents Thuật ngữ viết tắt. 5 Phần 1: Cloud Computing và các giải pháp. Cloud computing. Hướng tiếp cận “Cloud computing” sử dụng công cụ nguồn mở. Các công cụ sử dụng. 32 Tháng 4/2012 Page 2 Cloud computing và OpenStack. 33 Phần 3: Security trong “Cloud computing. Các giải pháp security cho mô hình “Cloud Computing.