scholarly journals Solid-State Emissive Metallo-Supramolecular Assemblies of Quinoline-Based Acyl Hydrazone

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 600 ◽  
Author(s):  
Hye Jin Cho ◽  
TaeWoo Kim ◽  
Hyunwoo Kim ◽  
Changsik Song
Keyword(s):  
Solid State ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Supramolecular Assembly ◽  
Optical Emission ◽  
Binding Mode ◽  
Binding Modes ◽  
Inductively Coupled ◽  
Acyl Hydrazone ◽  
Hydrazone Derivative

Development of fluorescence-based sensory materials for metal elements is currently in the mainstream of research due to the simplicity and usability of fluorescence as a method of detection. Herein, we report a novel “bis”-quinoline-based acyl hydrazone—named bQH that could be synthesized by a facile, low-cost method through simple condensation of hydrazide with an aldehyde. This acyl hydrazone showed emissive properties through Zn selective binding, especially in its solid-state, as shown by experiments such as UV–Vis, photoluminescence (PL), nuclear magnetic resonance (NMR), and inductively-coupled plasma-optical emission spectroscopies (ICP-OES), and energy-dispersive X-ray spectroscopy (EDS) mapping. The binding modes in which bQH coordinates to Zn2+ was proved to consist of two modes, 1:1 and 1:2 (bQH:Zn2+), where the binding mode was controlled by the Zn2+ ion content. Under the 1:1 binding mode, bQH-Zn2+ complexes formed a polymeric array through the metallo-supramolecular assembly. The resulting bQH-Zn2+ complex maintained its fluorescence in solid-state and exhibited excellent fluorescence intensity as compared to the previously reported quinoline-based acyl hydrazone derivative (mQH).

scholarly journals Investigation of sodium borohydride and hydrazine oxidation on gold nanoparticles modified zinc–cobalt coating

Chemija ◽  
2019 ◽  
Vol 30 (3) ◽  
Author(s):  
Aušrinė Zabielaitė ◽  
Aldona Balčiūnaitė ◽  
Dijana Šimkūnaitė ◽  
Jūratė Vaičiūnienė ◽  
Algirdas Selskis ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Sodium Borohydride ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Titanium Substrate ◽  
Optical Emission ◽  
Alkaline Solutions ◽  
Inductively Coupled ◽  
Cobalt Coating

This work presents the investigation of the electrochemical oxidation of hydrazine and sodium borohydride ions in alkaline solutions on the Au nanoparticles modified ZnCo coating surface, which was deposited on the titanium substrate (termed as AuZnCo/Ti). The AuZnCo/Ti catalysts were prepared via a facile electrochemical deposition technique followed by a simple and low-cost galvanic displacement. Scanning electron microscopy, energy dispersive X-ray analysis and inductively coupled plasma optical emission spectroscopy were used for characterization of the prepared catalysts surface morphology, structure and composition, whereas their electrocatalytic behaviour was investigated for the electrochemical oxidation of hydrazine and sodium borohydride in an alkaline medium using cyclic voltammetry. It has been determined that the AuZnCo/Ti catalysts with Au loadings of 31, 63 and 306 µg cm–2 show enhanced catalytic activity towards the electrochemical oxidation of both hydrazine and sodium borohydride as compared to that of the ZnCo/Ti catalyst.

A new closed-vessel conductively heated digestion system: fostering plant analysis by inductively coupled plasma optical emission spectroscopy

2014 ◽  
Vol 29 (5) ◽  
pp. 825-831 ◽  
Author(s):  
Kelber Miranda ◽  
Edenir Rodrigues Pereira-Filho ◽  
José Anchieta Gomes Neto
Keyword(s):  
High Throughput ◽  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Low Cost ◽  
Optical Emission ◽  
Plant Analysis ◽  
Closed Vessel ◽  
Inductively Coupled ◽  
Plasma Optical Emission Spectroscopy

A high-throughput, low cost and efficient device based on conductive heating and closed-vessels was developed and applied to plant digestion.

scholarly journals Fortification of Ground Roasted Coffees with Iron, Zinc, and Calcium Salts: Evaluation of Minerals Recovery in Filtered and Espresso Brews

Beverages ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 4 ◽  
Author(s):  
Angela Soares ◽  
Nathalia M. Barros ◽  
Tatiana D Saint’Pierre ◽  
Juliana De P. Lima ◽  
Verônica Calado ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Optical Emission ◽  
Food Product ◽  
Emission Spectrometry ◽  
Micronutrient Deficiencies ◽  
Mineral Salts ◽  
Inductively Coupled ◽  
Plasma Optical Emission Spectrometry ◽  
Selection Of

Micronutrient deficiencies are of great public health and socioeconomic importance. Food fortification has been widely used as a simple low-cost resource to increase mineral intake. Considering that coffee is the most consumed food product worldwide, in this study, C. arabica and C. canephora seeds were roasted, ground, and fortified with three salts of iron, zinc, and calcium as part of the selection of appropriate mineral vehicles for fortification. After ranking the performance through a test by a trained tasters’ panel, only two salts for each mineral remained. Mineral recoveries were evaluated by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) in filtered (paper and nylon filters) and espresso brews. The best mean recoveries for each mineral in espresso brew prepared from fortified coffees were: 80.8% of iron as ferrous bisglycinate chelate, 75.4% of zinc as zinc lactate, and 72.1% of calcium as calcium lactate. These better ranked salts by the tasters’ panel. In filtered brews, mean recovery values of 51.1%, 47.6%, and 51.6% were obtained for the same mineral salts, respectively. No difference or very small differences were observed between species and types of filter. The results implications are discussed.

High-throughput sugarcane leaf analysis using a low cost closed-vessel conductively heated digestion system and inductively coupled plasma optical emission spectroscopy

2014 ◽  
Vol 6 (23) ◽  
pp. 9503-9508 ◽  
Author(s):  
Kelber Miranda ◽  
Alan Lima Vieira ◽  
José Anchieta Gomes Neto
Keyword(s):  
High Throughput ◽  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Low Cost ◽  
Optical Emission ◽  
Closed Vessel ◽  
Inductively Coupled ◽  
Leaf Analysis ◽  
Plasma Optical Emission Spectroscopy

A CHDS with quartz tubes is a low cost alternative to MW digestion for laboratories involved in sugarcane leaf analysis.

scholarly journals Thermal and Calorimetric Evaluations of Some Chemically Modified Carbohydrate-Based Substrates with Phosphorus-Containing Groups

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 588 ◽  
Author(s):  
Ananya Thomas ◽  
Paul Joseph ◽  
Khalid Moinuddin ◽  
Haijin Zhu ◽  
Svetlana Tretsiakova-McNally
Keyword(s):  
Solid State ◽  
Inductively Coupled Plasma ◽  
31P Nmr ◽  
Potato Starch ◽  
Analytical Techniques ◽  
Optical Emission ◽  
31P Nmr Spectroscopy ◽  
Icp Oes ◽  
Thermal Stabilities ◽  
Inductively Coupled

In the present article, we report on the chemical modifications of some carbohydrate-based substrates, such as potato starch, dextran, β-cyclodextrin, agar agar and tamarind, by reacting with diethylchlorophosphate (DECP), in dispersions in dichloromethane (DCM), in the presence of triethylamine (TEA) as the base. The modified substrates, after recovery and purification, were analyzed for their chemical constitutions, thermal stabilities and calorimetric properties using a variety of analytical techniques. These included: solid-state 31P NMR, inductively coupled plasma-optical emission spectroscopy (ICP-OES), thermogravimetric analysis (TGA) and pyrolysis combustion flow calorimetry (PCFC). The unmodified counterparts were also subjected to the same set of analyses with a view to serving as controls. Phosphorus analyses, primarily through ICP-OES on the recovered samples, showed different degrees of incorporation. Such observations were optionally verified through solid-state 31P NMR spectroscopy. The thermograms of the modified substrates were noticeably different from the unmodified counterparts, both in terms of the general profiles and the amounts of char residues produced. Such observations correlated well with the relevant parameters obtained through PCFC runs. Overall, the modified systems containing phosphorus were found to be less combustible than the parent substrates, and thus can be considered as promising matrices for environmentally benign fire-resistant coatings.

Analysis and Control of Plating Baths in the Electrodeposition of Copper Indium Gallium Selenide (CIGS) Films with Ion Chromatography

2011 ◽  
Vol 1323 ◽  
Author(s):  
Alan Kleiman-Shwarsctein ◽  
Serdar Aksu ◽  
Tuncay Cetiner ◽  
Sarah Lastella ◽  
Mustafa Pinarbasi
Keyword(s):  
Ion Chromatography ◽  
Inductively Coupled Plasma ◽  
Raw Materials ◽  
Low Cost ◽  
Optical Emission ◽  
High Volume ◽  
Precise Determination ◽  
Inductively Coupled ◽  
Anionic Species ◽  
High Yields

ABSTRACTCu(In,Ga)Se2 (CIGS) is one of the most advanced absorber materials with conversion efficiencies reaching up to about 20%. Electrodeposition of CIGS precursors is highly attractive due to its low cost, efficient utilization of raw materials and scalability to high-volume manufacturing, however, a strict chemistry control of the plating baths is required in a manufacturing environment to ensure a consistent plating process with high yields. In the present study, we tested the use of ion chromatography (IC), for the quantitative analysis of both the cationic and anionic species in a variety of aqueous alkaline electroplating solutions we developed for the fabrication of CIGS precursors. Using ion chromatography we were able to precisely determine the concentrations of several key anions commonly employed in the plating baths including chloride, sulfate, selenite, selenate, tartrate, citrate, gluconate, and ethylenediaminetetraacetate. Our results indicated IC might not be a suitable method to determine the cationic concentrations for Cu, In, Ga ions when complexing species, such as ethylenediaminetetraacetate, are present in the electroplating solutions. We determined that inductively coupled plasma optical emission spectroscopy (ICP-OES) could be used instead for the precise determination of the cationic concentrations.

scholarly journals Heavy Metal Determination in Lipstick Products Using Inductively Coupled Plasma (ICP)

2021 ◽  
pp. 265-277
Author(s):  
Asma A. Al-Mouraee ◽  
Faten M. Ali Zainy
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Correlation Coefficients ◽  
Optical Emission ◽  
The Body ◽  
Allowable Limit ◽  
Inductively Coupled ◽  
Nitric Acid Digestion

Cosmetics production and use are growing worldwide, yet users are concerned about toxicity and heavy metal pollution. Following nitric acid digestion, the estimated levels of lead (Pb), nickel (Ni), chromium (Cr), cadmium (Cd), arsenic (As), mercury (Hg), titanium (Ti), iron (Fe), and cobalt (Co), in 6 brands of lipstick (12 samples) obtained in the Saudi market have been computed by inductively coupled plasma optical emission spectroscopy. Correlation coefficients (R2) varied from 0.9992 to 0.9999 on the calibration curve, indicating good linearity. Except for low-cost specimens, the findings indicate that the concentrations of the metals under investigation are often lower than the acceptable limits of both the Saudi Standards, Metrology, and Quality Organization (SASO) and the Food and Drug Administration (FDA) (which revealed the maximum lead levels of 125.30 ppm, exceeding the allowed limit of 10 ppm). Arsenic was discovered in significant concentrations, exceeding the SASO permitted limit. Nickel was found at the FDAs allowable limit; chromium and cobalt were found in variable quantities in the majority of the specimens. Dark-colored lipstick had a greater overall content of heavy metals than light-colored lipstick. Numerous tests on SASO-approved lipsticks were conducted as part of the research. The lower-cost specimens were of lesser quality, failing some SASO tests. All such findings suggest that users should be cautious when buying low lipsticks since heavy metals may build up in the body over time, causing skin problems or diseases like cancer.

scholarly journals Optimization of ICP-OES’S parameters for uranium analysis of rock samples

2021 ◽  
Author(s):  
Xiaozhe Li ◽  
Chao Xiong ◽  
Kun Sun ◽  
Fang Fang ◽  
Qingxian Zhang
Keyword(s):  
Quantitative Analysis ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Optical Emission ◽  
Volumetric Method ◽  
Icp Oes ◽  
Pumping Rate ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

AbstractCurrently, the quantitative analysis methods for uranium that are widely used in laboratories, such as the volumetric method and inductively coupled plasma mass spectrometry (ICP-MS) cannot achieve low cost, simple operation, and little influence by other elements. The inductively coupled plasma optical emission spectrometer (ICP-OES) has a wide linear range, and high stability, and can be used to identify multiple elements simultaneously. However, when ICP-OES is used for quantitative analysis of uranium, the settings for the RF power, nebulizer flow, and pump rate can affect the analysis results. In this work, these parameters were carefully optimized for identifying uranium. Based on experiments, we selected two spectrum peaks 409.014 nm and 424.167 nm for quantitative analysis with the lowest interference. The optimal parameters obtained are atomizer flow rate of 0.75 L/min, a sample pumping rate of 1.6 mL/min, and a high-frequency power of 1400 W. Then we compared the accuracy of the volumetric method, ICP-MS method and ICP-OES method with the optimized parameter for analysis of experimental samples and references. The results showed that the ICP-OES with the optimized parameters proposed in this paper can be used to perform a convenient, quick, and efficient quantitative analysis of uranium in minerals.

Metals Composition in Low Cost Apartment in Kuala Lumpur

2019 ◽  
Vol 13 (2) ◽  
pp. 18
Author(s):  
Ali Jawad ◽  
Zitty Sarah Ismail
Keyword(s):  
Statistical Analysis ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Optical Emission ◽  
Mean Value ◽  
Kuala Lumpur ◽  
Metal Pollutants ◽  
Inductively Coupled ◽  
The Mean ◽  
Four Levels

House dust was found to be a great indicator of metal pollutants for indoor air quality. This study aims to assess the level of metals in house dusts and identify the relationship between the composition of metals concentration in low cost apartment, Kuala Lumpur. Eight houses were selected randomly from four levels of low cost apartment buildings. The samples were collected using a brush and plastic pan and then the samples were digested. The compositions of metals were determined using Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES) and statistical analysis was used to analyze the data by using Statistical Packages for the Social Sciences (SPSS). The results show that the highest concentration of metals obtained was Fe with the mean value of 1483.64 mg/kg followed by Zn with the mean value of 1197.07 mg/kg, while Cd recorded as the lowest mean value of 0.131 mg/kg. The trend distribution of metals in the investigated areas followed the order Fe > Zn > Cu > Pb > Cd. Statistical analysis indicates significant correlation between all the possible pairs of metals.

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