cloud point soil

Cloud Point Extraction With Triton X-114 for …

22 Citations. Explore all metrics. Abstract. A new and efficient analytic methodology based on cloud point extraction (CPE) was developed for determination of …

Generating high-accuracy and cloud-free surface soil …

1. Introduction. As an "Essential Climate Variable" in the Global Climate Observing System, surface soil moisture (SSM) plays a vital role in earth science and environmental studies such as numerical weather prediction, land-atmosphere interaction, drought monitoring, and agricultural and hydrological management (Humphrey et al., …

How Boomitra's AI Measures Soil Carbon — Agerpoint

Boomitra can help them improve agricultural practices, store more carbon in their soil, and, through carbon credits, make them more money. In an interview with The Point Cloud at the AIM for Climate Summit in Washington, D.C., Boomitra explained how Boomitra measures carbon soil levels through a combination of on-the-ground samples, …

A Simple Method for Separating Phenanthrene from Soil by Cloud-Point …

Therefore, in this study, we focused on cloud-point extraction (CPE) without centrifugation, which separates PAHs from the washing solution through gravitational sedimentation. Specifically, we examined the conditions for the separation of phenanthrene (a typical PAH pollutant) from soil using CPE.

Investigation of cloud point extraction for the analysis of …

Cloud point extraction (CPE) involves the addition of a surfactant at a concentration above its critical micelle concentration (CMC). If the solution temperature is increased above the cloud point temperature of the surfactant, micelles are formed via dehydration, and become less soluble in water. ... Soil extracts (< 0.45 μm) were then ...

Determination of polonium-210 in environmental samples …

The cloud point extraction of polonium was performed in 8 M HCl and showed negligible K d values of 4 and 14 using TODGA and TIPDGA as extracting agents, ... soil digested samples), for a wide range of activities (0.0031–866 Bq g −1), and has excellent recoveries (>87%).

Investigation of cloud point extraction for the analysis of …

Investigation of cloud point extraction for the analysis of metallic nanoparticles in a soil matrix ... Soil extracts (<0.45 μm) were then gravimetrically spiked with stock solution of AuNPs (BBI60) to a concentration from (10 to 500) μg kg −1 and mixed end-over-end overnight (≈12 h). Finally, the soil samples were extracted by CPE using ...

Generating high-accuracy and cloud-free surface soil …

Generating high-accuracy and cloud-free surface soil moisture at 1 km resolution by point-surface data fusion over the Southwestern U.S. Author links ... 2011). In this case, it is natural to consider the combination of point-based data (in-situ ground measurements) and areal products (satellite or airborne based data), which have ...

Investigation of cloud point extraction for the analysis …

study was to explore cloud point extraction (CPE) as a viable method to pre-concentrate gold nanoparticles (AuNPs), as a model MNP, spiked into a soil extract matrix. To that end, different extraction conditions and surface coatings were evaluated in a simple matrix. The CPE method was then applied to soil extract samples spiked with AuNPs.

Promising technique, cloud point extraction: …

One of the best alternative methods that uses surfactant to extract organic/inorganic parts is the cloud point extraction CPE. It is a fast, easy and …

Cloud Point Extraction

Cloud-point extraction: A micelle-mediated extraction involves the surfactant-based extraction methodology to preconcentrate the inorganic/organic analytes. 3. ... plant accident in 2011 had released large amounts of radioactive substances into the environment and contaminated the soil in Japan. A terrestrial cyanobacterium, Nostoc commune, ...

Point cloud semantic segmentation of complex railway …

DOI: 10.1016/j.autcon.2022.104425 Corpus ID: 249856642; Point cloud semantic segmentation of complex railway environments using deep learning @article{Grandio2022PointCS, title={Point cloud semantic segmentation of complex railway environments using deep learning}, author={Javier Grandio and Bel{'e}n Riveiro …

Cloud point extraction

The surfactant concentration plays an important rule for the success of the extraction by cloud point technique. Mathematically, preconcentration factor (C F) of CPE decreases with increasing surfactant concentration at a fixed volume of aqueous phase as shown in Eq. (2) [51]: (3) C F = % E V 0 100 V s where, V 0 and V s are the volumes of …

Cloud point extraction and flame atomic absorption …

A cloud point extraction procedure was presented for the preconcentration of copper(II) ion in various samples. After complexation by 4-(phenyl diazenyl) benzene-1,3-diamine (PDBDM) (chrysoidine), copper(II) ions were quantitatively recovered in Triton X-114 after centrifugation. 0.5 ml of methanol acidified with 1.0 mol L −1 HNO 3 was added …

Cloud Point Extraction With Triton X-114 for …

Abstract. A new and efficient analytic methodology based on cloud point extraction (CPE) was developed for determination of pesticide residues of metsulfuron-methyl (MSM), …

Ultrasound-assisted dual-cloud point extraction with high …

A method for simultaneous preconcentration and determination of mercury species in water and soil samples was established using high-performance liquid chromatography with hydride generation atomic fluorescence spectrometry after ultrasound-assisted dual-cloud point extraction. The extraction process was divided into two steps.

Speciation Analysis of Selenium Nanoparticles and Inorganic …

Herein, for the first time, a Triton X-45 (TX-45)-based dual-cloud point extraction (CPE) method was established for the selective determination of SeNPs, Se(IV), and Se(VI) in water. TX-45 can adsorb on the surface of SeNPs and facilitate the extraction of SeNPs into the lower TX-45-rich phase in the first CPE, while Se(VI) and Se(IV) retain ...

Ultrasound‐assisted dual‐cloud point extraction …

A method for simultaneous preconcentration and determination of mercury species in water and soil samples was established using high-performance liquid chromatography with hydride …

Combination of cloud point extraction with single particle

Effect of cloud point extraction and soil matrix on the sizing of AgNPs. In this study, the size determination of the silver nanoparticles in soil leachates can be affected by soil matrix because it contains diverse components with charged surfaces such as clay particles or humic acids [54, 55]. Hence, an evaluation of the potential matrix ...

Comparative Analysis of Algorithms to Cleanse Soil …

The quality of the structuring of a highly dense 3D point cloud (in this study, 0.4 points per cm2) at the microscale therefore particularly depends on the choice of the algorithm. While graph-based methods are robust against noise or uneven density, edge-based and region-based methods are sensitive to noise [15].

CLOUD POINT EXTRACTION AND ORGANIC …

A new extraction and preconcentration procedure for organic compounds originally present in aqueous or solid matrices (soil, coal) based upon the unique properties (i.e. …

Investigation of cloud point extraction for the analysis of …

The objective of this study was to explore cloud point extraction (CPE) as a viable method to pre-concentrate gold nanoparticles (AuNPs), as a model MNP, spiked into a soil extract matrix. To that end, different extraction conditions …

Estimating Particle-Size Distribution from Limited Soil …

sand, silt, and clay fractions define two points on the 0, and it is necessary to specify the value of the distribution at r 0, P(r 0) 0. Second, the model dictates P(r 2) P(r 1) for any r 2 r 1, which may not be consistent with an exceptionally George E. Brown, Jr. Salinity Lab., 450 W. Big Springs Rd., Riverside, poorly graded soil.

Ultrasound‐assisted dual‐cloud point extraction …

Ultrasound‐assisted dual‐cloud point extraction with high‐performance liquid chromatography‐hydride generation atomic fluorescence spectrometry for mercury speciation analysis in …

Determination of trace vanadium in soil by cloud point …

This work describes a new analytical procedure for trace vanadium by graphite furnace atomic absorption spectroscopy coupled to cloud point extraction (CPE) as the separation-preconcentration method. The CPE behavior of vanadium using methylene blue as complex agent and Triton X-100 as a surfactant was investigated …

Investigation of cloud point extraction for the analysis of …

The objective of this study is to explore the cloud point extraction (CPE) method to pre-concentrate gold nanoparticles (AuNPs) spiked into a soil extract matrix. To that end, different extraction conditions and surface coatings were evaluated in a simple matrix. Then the method was applied to soil extract samples spiked with AuNPs.

Cloud Point

Cloud point is the temperature at which wax (paraffin) begins to separate when oil chilled to a low temperature, and it serves as an important indicator of practical performance in …

Generalization considerations and solutions for point cloud …

Generalizing point cloud classifiers can be a time saving tool. ... The classifier is trained to identify basic hillslope topographic features, including vegetation, soil, talus, and bedrock using multi-scale geometric features of the point cloud. Four rock and soil slopes in western Colorado were scanned using TLS. Generalization experiments ...

Recent developments and applications of cloud point extraction…

The micro-cloud point extraction (M-CPE) was firstly introduced by Ghasemi and Kaykhaii in 2015 to reduce the use of organic solvent during the extraction and spectrophotometric determination of U 6+ and V 5+ in brine [157]. The amount of organic solvent (methanol) was reduced to 0.05 mL and a micro-cuvette was used during …

Cloud-point extraction coupled to in-situ metathesis

Cloud-point extraction (CPE) is a pre-treatment technique for the extraction and preconcentration of different chemical compounds, such as metal ions, pesticides, drugs, phenols, vitamins etc ...