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The ICP source offers extended linearity and sensitivity, better than classical atomic absorption spectroscopy (AAS).
These results should extend the range of applications in which absorption spectroscopy sensors are attractive candidates.
This approach improves analytical efficiency over that for conventional atomic absorption methods, while minimizing loss of accuracy or precision for individual elements.
The ease and accuracy of atomic absorption spectrophotometry is due to the improved equipment now used while earlier devices had insufficient sensitivity for the determination of concentrations in the order of 1 μg/ml.
The continuum source atomic absorption spectrometer can be used for the investigation of spectra interferences in Zeeman corrected AA spectrometry.
It is shown that the dynamic range of atomic absorption analytical curves can be readily extended with an ac Zeeman system.
The results obtained agree well with those samples analyzed by atomic absorption spectrophotometry (AAS).
Comparison with values in the literature shows that our reference values are in agreement with published results obtained by flameless atomic absorption spectroscopy.
This method correlated well with atomic absorption spectrometry.
It turned out that the class “atomization efficiency interferences” might constitute one of the most serious sources of systematic error in frameless atomic absorption spectrometry.
The use of this method for quantitative analysis, using atomic absorption spectra, eliminates the effect of the composition of the sample on the analytical results.
It is cheaper and more accurate than atomic absorption.
It is shown that integration in absorbance, not in intensity, is a pre-requisite for absolute detection in atomic absorption spectrometry.
Therefore, the more frequent use of radiotracers in investigations aimed at improving the accuracy of atomic absorption spectrometric methods would be beneficial.
The most crucial finding in this study is that measurement of the effective atomic number is not appropriate near to the absorption edge and the effective atomic number is affected by near to the absorption edge.
By avoiding such errors, the benefits of atomic absorption analysis with spatial resolution over conventional AAS are directly demonstrated.
Analytical figures of merit were found to be better than those obtained from previous work attempted with inductively coupled plasma atomic absorption spectroscopy and approaching that of flame atomic absorption spectroscopy.
The proposed device is easily adapted to any atomic absorption spectrometer.
This approach may offer a future path for the continued development of atomic absorption.

Related Questions

How much cost of FTIR?4 answersFTIR spectrometers have a wide range of costs. Portable spectrometers produced by major analytical instrument companies have cost in the range of $20,000 - $50,000. The cost of Fourier Transform Infrared Spectroscopy: Applications to Chemical Systems Vol 1 is $25. A spatial-domain Fourier Transform (FT) infrared (IR) spectrometer developed for noninvasive measurement of analyte concentrations in cell culture media has a spectral range of $2.0-2.5μm. Hyperspectral imaging (HSI) sensors, which can be used for chemical vapor plume visualization and identification, are currently expensive, with prices exceeding $750,000.
Can Atomic Absorption Spectroscopy be used for desalination studies?5 answersAtomic Absorption Spectroscopy (AAS) has been widely used for the analysis of various elements in different matrices, including food products. It has also been applied for the determination of metallic and nonmetallic elements in vegetable oils and animal fats. However, none of the abstracts provided specifically mention the use of AAS for desalination studies. Therefore, based on the information available, it cannot be concluded whether AAS can be used for desalination studies or not. Further research or information from other sources would be needed to determine the applicability of AAS in desalination studies.
How are atomic absorption and emission spectroscopy used to analyze nanomaterials?5 answersAtomic absorption and emission spectroscopy are used to analyze nanomaterials in various ways. These techniques are employed to improve the sensitivity and selectivity of atomic spectrometric methods, broaden the application range to biological-molecule detection, and characterize and determine nanomaterials themselves and their impurities. X-ray absorption spectroscopy (XAS) is another powerful technique used to study nanomaterials. It helps determine the variation in interatomic distances, coordination numbers, and the type of neighboring atoms within the first few coordination shells of the atom of interest in nanoparticles. Additionally, ultraviolet-visible (UV-vis) spectroscopy, infrared (IR) absorption spectroscopy, Raman scattering, and surface-enhanced Raman scattering (SERS) are used for nanomaterial characterization. These spectroscopic techniques provide valuable information on the structural and chemical properties of nanomaterials.
What is atomic absorption spectrometry?3 answersAtomic absorption spectrometry (AAS) is a technique used for the determination and identification of trace elements in various samples, including wine, environmental samples, pharmaceuticals, and food. AAS utilizes the absorption of electromagnetic radiation by ground state atoms to measure the concentration of specific elements in a sample. The technique can be performed using different atomizers, such as flame and electrothermal atomizers, which allow for the analysis of both routine and ultratrace levels of metals. AAS instruments consist of various components, including radiation emitters, detectors, and control modules, which enable the measurement and analysis of the absorbed radiation. The technique is widely used due to its fast testing speed, high sophistication, and ability to provide accurate and sensitive results.
How effective atomic absorption spectorumety?5 answersAtomic absorption spectrometry is an effective analytical technique for detecting and quantifying elements in a sample. It offers several advantages such as high sensitivity, improved signal-to-noise ratio, and reliable analytic results. The spectrometer consists of various components including a light source, atomization system, optical system, and processing device. These components work together to heat and atomize the sample, emit and transmit light through the sample, and detect the transmitted light. The use of computer technology enhances the automation and reliability of the spectrometer. Different types of atomizers can be combined in a single spectrometer, allowing for the detection of various elements with simple operation. Overall, atomic absorption spectrometry is a powerful tool for elemental analysis, offering improved sensitivity, reliability, and versatility in detecting microelements and trace elements.
How do you read absorption line spectra?8 answers

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The wavelength resolution of a spectrometer is a crucial parameter for its performance. Various spectrometers discussed in the provided contexts demonstrate different levels of resolution. For instance, a spectrometer achieved ultrahigh resolution better than 0.012 nm/pixel in the 170-600 nm spectral region using a grating-integrated module. Another study presented an ultra-compact infrared spectrometer with high resolution of approximately 0.6 nm. Moreover, a method was proposed to evaluate spectral resolution based on focus depth, with simulated spectral resolution values ranging from 1.2 nm to 1.7 nm at 480 nm. These examples highlight the diverse capabilities and approaches to achieving high-resolution wavelength measurements in different spectrometer designs.
How does pXRF work by exciting atoms?
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pXRF, or portable X-ray fluorescence, works by exciting atoms in various materials, including soils, for elemental composition determination. This technique utilizes X-ray radiation to induce fluorescence in atoms, allowing for the identification and quantification of elements present in the sample. By analyzing the characteristic X-rays emitted when atoms return to their ground state after being excited, pXRF provides valuable information on nutrient, trace, and rare-earth elements in soils. Additionally, pXRF has been successfully applied in environmental, agronomic, and pedological studies, offering a non-destructive and efficient method for soil characterization. The use of pXRF in developing countries, like Brazil, can significantly contribute to advancing soil science by providing rapid and environmentally friendly soil analysis capabilities.
During fermentation does yeast alter phenolic compounds?
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During fermentation, yeast, particularly Saccharomyces cerevisiae, plays a crucial role in altering phenolic compounds. Yeasts impact the sensory attributes and quality of wine by transforming grape phenolic compounds during winemaking. Additionally, yeast strains like S. cerevisiae are involved in adsorbing polyphenols on their surface, affecting the colloidal stability of beer. Furthermore, the fermentation process can lead to changes in the antioxidant activity of phenolic substances, as observed in studies where fermentation impacted the enzymatic mechanism of oxidative stress resolution in yeast cells. Understanding these yeast-phenolic interactions is essential for controlling wine quality and enhancing the tolerance of yeast strains to phenolic fermentation inhibitors. Therefore, yeast indeed alters phenolic compounds during fermentation, influencing the quality and characteristics of fermented products.
Does any paper published with graphene oxide loaded with titanium dioxide for brilliant blue dye degradation?
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Yes, research has been conducted on the degradation of brilliant blue dyes using graphene oxide loaded with titanium dioxide composites. Studies have shown that graphene oxide composite with titanium dioxide nanoparticles exhibited efficient degradation of dyes like methylene blue. Additionally, the synergistic effect of graphene-Fe₂O₃-TiO₂ nanocomposites has been explored for enhanced dye degradation, indicating improved efficiency in degrading dyes under sunlight irradiation. Furthermore, the photocatalytic activity of reduced graphene oxide-TiO₂ composites has been investigated, demonstrating high degradation rates for anionic and cationic dyes like Eosin Y and Methylene blue. These studies highlight the potential of graphene oxide loaded with titanium dioxide for the degradation of brilliant blue dyes, showcasing its effectiveness in wastewater treatment applications.
How much do weaned piglets eat at night?
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Weaned piglets have varying feeding patterns at night based on different studies. Research suggests that feeding frequencies and timings can impact piglet growth and performance. For instance, a study on weaned piglets within 30 days of weaning found that feeding occurred three times a day during specific time intervals, with the last feeding session around 19:00-20:00. Another study focused on the effects of different feeding frequencies on sows during lactation, indicating that night feeding at 22:00 was beneficial for litter growth. These findings highlight the importance of considering feeding schedules and frequencies to optimize the growth and health of weaned piglets, with specific attention to nighttime feeding practices.
Whats is the chemical reaction between aqueos polyvinilpyrrolidone and aqueos zinc nitrate hexahydrate?
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The chemical reaction between aqueous polyvinylpyrrolidone (PVP) and aqueous zinc nitrate hexahydrate involves the formation of complexes consisting of polymer molecules and metal ions, specifically zinc ions. Additionally, the presence of PVP in the reaction can inhibit the photodecomposition of other organic materials when exposed to UV irradiation, showcasing its stabilizing effect in the presence of metal nitrates. Moreover, the utilization of PVP-intercalated Mn0.07 VOx (PVP-MnVO) in cathodes for aqueous zinc-ion batteries has shown enhanced performance, with expanded interlayer spacing facilitating rapid diffusion of Zn2+ ions and resulting in improved discharge capacity, rate capability, and cycling stability compared to MnVO alone.
Show the mechanism of the chemical reaction between aqueous polyvinylpyrrolidone and aqueous zinc nitrate hexahydrate via electrospinning?
5 answers
The chemical reaction mechanism between aqueous polyvinylpyrrolidone (PVP) and aqueous zinc nitrate hexahydrate during electrospinning involves the formation of complexes consisting of polymer molecules and metal ions, as indicated by IR spectroscopy results. In the electrospinning process, PVP molecules are added to a ZnO sol to achieve appropriate rheology for fiber formation, resulting in PVP/ZnO composite nanofibers with a network structure resembling a spider's web. By controlling the metal nitrate concentration in precursor solutions, the average diameter of electrospun NiZn ferrite nanofibers can be adjusted without affecting crystal structure, leading to improved process yield and reduced material costs. Additionally, the successful preparation of PVA nanofibers containing functional ZnS nanoparticles by electrospinning involves the dispersion of ZnS nanoparticles with a cubic structure in PVA nanofibers, characterized by SEM, TEM, and XRD analyses.
How does the content of selected macro elements in milk vary from different breeds?
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The content of selected macro elements in milk varies among different breeds. Research on dog milk showed that calcium, magnesium, potassium, sodium, copper, zinc, manganese, and iron levels did not significantly differ across various breeds during lactation. In contrast, a study on Croatian Coldblood mares found varying concentrations of macro-elements like calcium, potassium, sodium, magnesium, and micro-elements like copper, iron, zinc, and selenium throughout different lactation phases. Additionally, a comparison of macro-element content in cow, goat, and human milk revealed significant differences in levels, with goat milk having higher concentrations of magnesium, potassium, and other elements compared to cow and human milk. These studies highlight the variability in macro-element content in milk across different animal breeds.
How absorbance thin film related to the thickness or volume?
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Absorbance in thin films is intricately linked to thickness and volume. The absorption kinetics and overall absorption of water into poly(4-ammonium styrenesulfonic acid) films were found to be independent of film thickness, with equilibrium swelling consistent across different thicknesses. Optical effects, including Fresnel refraction and interference fringes, cause absorbance line shifts in thin films, with variations depending on film thickness and dielectric constant. In the case of silver thin films, absorbance values linearly correlate with film thickness, enabling real-time monitoring and applications in sensors. For regioregular poly(3-hexylthiophene) thin films, absorbance spectra provide insights into film properties like thickness and crystallinity, offering a non-destructive method for characterization. Thickness measurements in extremely thin films are influenced by mass absorption coefficients and volume charges, impacting the accuracy of measurements.
Does the peak absorbance of pigments differ between in vivo and in vitro?
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The peak absorbance of pigments can differ between in vivo and in vitro conditions. Research has shown that the absorption coefficients of separated pigments in leaves in vivo display similar physical principles to those in organic solutions, but with differences in peak positions. Additionally, studies on Synechocystis sp. PCC 6803 optical strains revealed that in vivo absorption spectra of chromophores are flatter and slightly broader compared to in vitro conditions, although the mean weight-specific absorption coefficient remains the same. Moreover, a study on melanin in human skin demonstrated that the absorption peak at 335 nm indicates the presence of melanin, showcasing differences in spectral signatures between in vivo and in vitro scenarios. These findings highlight the importance of considering environmental factors when analyzing pigment absorbance.
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Calibration marks can change over time due to various factors. Methods like metering in solution and correlating with pre-identified marks can help ensure calibration stability. Real-time calibration instruments on writing devices adjust parameters based on mark patterns, maintaining accuracy. Biometric authentication devices use weighted biometric values integrated into templates for continuous calibration. Correction methods for shrinkage involve real-time updating of alignment marks to reset altered virtual coordinates, ensuring accurate pattern alignment. Non-linear chemical sensors combat calibration shifts by calculating zero chemical signals and concentrations over time, minimizing errors in concentration determination. These approaches highlight the importance of continuous monitoring and adjustment to maintain calibration accuracy over time.