answersLogoWhite

0

Search results

spectrophotometry is a branch of spectroscopy dealing with measurement of radiant energy transmitted or reflected by a body as function of wave lenght %

1 answer


By chemical analysis: Uv-vis absorption spectrophotometry, atomic absorption spectrophotometry, inductively coupled plasma mass spectrometry, inductively coupled plasma emmission spectrometry, polarograhy, phosphorescence fluorometry, flame spectrophotometry, etc.

1 answer


The term "Spectrophotometry" refers to an instrument that is often used to determine the intensity of the various wavelengths in a spectrum of light. This tool is a part of analytical chemistry.

1 answer


Still have questions?
magnify glass
imp

Photospectrometry measures how light interacts with matter to analyze the composition and properties of substances, while spectrophotometry measures the intensity of light absorbed or transmitted by a substance to determine its concentration within a sample. In essence, photospectrometry focuses on the interaction of light and matter, while spectrophotometry focuses on the concentration of a substance.

2 answers


In a spectrophotometry experiment, there is an inverse relationship between wavelength and absorbance. This means that as the wavelength of light increases, the absorbance decreases, and vice versa.

1 answer


A high absorbance in a spectrophotometry analysis indicates that a substance strongly absorbs light at a specific wavelength, which can be used to determine the concentration of the substance in the sample.

1 answer


A high absorbance in spectrophotometry indicates that a substance strongly absorbs light at a specific wavelength, suggesting a high concentration of that substance in the sample being analyzed.

1 answer


A higher absorbance in a spectrophotometry experiment indicates that more light is being absorbed by the sample, suggesting a higher concentration of the substance being measured.

1 answer


A higher absorbance value in a spectrophotometry experiment indicates that more light is being absorbed by the sample, suggesting a higher concentration of the substance being measured.

1 answer


High absorbance in the context of spectrophotometry indicates that a substance is absorbing a significant amount of light at a specific wavelength. This can suggest a high concentration of the substance being measured in the sample.

1 answer


Spectrophotometry can be applied to the study of a large number of substances.

1 answer


For example UV-VIS absorption spectrophotometry.

2 answers


The Lambert-Beer law is the base of absorption spectrophotometry.

1 answer



Spectrometry and spectrophotometry are both techniques used in analytical chemistry to measure the interaction of light with matter. Spectrometry involves measuring the intensity of light at different wavelengths to identify and quantify substances in a sample. Spectrophotometry, on the other hand, specifically measures the amount of light absorbed or transmitted by a sample at a particular wavelength, providing information about the concentration of a substance in the sample. Both techniques are valuable in identifying and quantifying substances in a sample, with spectrophotometry being more focused on measuring the concentration of a specific substance.

1 answer


Spectrophotometry utilizes a light source such as a tungsten lamp, deuterium lamp, or xenon lamp to produce light at specific wavelengths. The light is then passed through a sample to determine its absorbance or transmittance at different wavelengths.

1 answer


Frank Twyman has written:

'Prism and lens making'

'The practice of absorption spectrophotometry with Hilger instruments' -- subject(s): Absorption spectra, Spectrophotometer, Spectrophotometry, Spectrum analysis

'Wavelength tables for spectrum analysis'

1 answer


1. Emission optical spectrography

2. ICP mass spectrometry

3. Atomic absorption spectrophotometry

4. Gravimetry

5. Volumetry/Potentiometry

6. ICP atomic spectrometry

7. Spectrophotometry with arsenazo III

etc.

1 answer


Spectrophotometry measures the amount of light absorbed or transmitted by a sample across a range of wavelengths, providing information on the sample's concentration and chemical structure. Differential spectrophotometry compares the absorption of light between two samples or two different conditions of the same sample, highlighting differences in concentration or composition.

2 answers


In spectrophotometry, optical density (OD) and absorbance are directly related. As the OD increases, the absorbance also increases. This means that a higher OD value indicates a higher absorbance of light by the sample being measured.

1 answer


Two common methods are atomic absorption spectrophotometry and flame photometry.

1 answer


K. Nandy has written:

'Spectrophotometry of cool stars in the near infrared' -- subject(s): Cool stars, Infrared astronomy, M stars, Spectra, Spectrophotometry

'The Aging Brain and Senile Dementia (Advances in Behavioral Biology ; V. 23)'

1 answer


R. Norman Jones has written:

'Computer programs for absorption spectrophotometry'

1 answer


Spectrophotometry is based on the principle that chemical compounds absorb light at specific wavelengths. By measuring the amount of light absorbed by a sample at different wavelengths, it is possible to quantitatively analyze the concentration of the compound in the sample. This technique is widely used in various fields including chemistry, biochemistry, and environmental science.

1 answer


In spectrophotometry, optical density and absorbance both measure how much light is absorbed by a sample. However, optical density is a logarithmic measure of the ratio of incident light to transmitted light, while absorbance is a linear measure of the amount of light absorbed by the sample.

1 answer


Extinction coefficient proteins are important in spectrophotometry because they help determine the concentration of a sample by measuring how much light is absorbed by the proteins. This information is crucial for accurately quantifying the amount of protein present in a sample, which is essential for various scientific and research purposes.

1 answer


They are detected by chemical methods of analysis as spectrophotometry, ion specific electrodes, titrimetry, etc.

1 answer


Methylene blue is used as a colorimetric indicator in spectrophotometry to determine the concentration of reducing substances. It acts as an electron acceptor and changes color when it is reduced, allowing for quantification of reducing agents present in a sample.

2 answers


Andrew Adamson MacPherson has written:

'Trace metal analysis in saline waters by atomic absorption spectrophotometry'

1 answer


Alan Thomas Koski has written:

'Spectrophotometry of Seyfert 2 galaxies and narrow-line radio galaxies'

1 answer


Lars-Henrik Andersson has written:

'Rapid spectrophotometric determination of plutonium' -- subject(s): Analysis, Plutonium, Spectrophotometry

1 answer


Blank Sample in Spectrophotometry is used to measure the absorbance of light without sample. It is subtracted from the total absorbance for measurement of Absorbance from a sample's absorbance.

1 answer


A release agent in atomic absorption spectrophotometry is a chemical solution used to prevent the adherence of sample residues on the surfaces of graphite tubes or cuvettes. It helps to maximize the analytical precision and prolong the lifetime of the instrument by reducing contamination and interference during the measurement process.

2 answers


To test a colorless solution, you can use chemical indicators or spectrophotometry. Chemical indicators can change color in the presence of specific substances, providing a visual indication of a reaction. Spectrophotometry measures the absorption or transmission of light by the solution at different wavelengths, allowing for the identification of compounds even if they are colorless.

2 answers


J. Haines has written:

'The Determination, by Atomic-Absorption Spectrophotometry using Electrothermal Atomization, of Platinum, Palladium, Rhodium, Ruthenium, and Iridum'

1 answer


Low absorbance in spectrophotometry means that the sample does not absorb much light at the specific wavelength being measured. This can impact the analysis of samples by making it difficult to accurately determine the concentration of the substance being measured. Low absorbance can result in less accurate readings and may require more sensitive equipment or different methods to obtain reliable data.

1 answer


Spectrofluorometry is more sensitive than spectrophotometry because it measures the emission of light at a specific wavelength, which reduces interference and background noise. Additionally, fluorescence signals are typically weaker and less affected by sample turbidity, leading to higher sensitivity compared to absorption-based spectrophotometry.

3 answers


To determine the presence of PO4 and SO4 ions in a solution of phosphoric acid, you can use analytical techniques such as ion chromatography, spectrophotometry, or titration methods. Ion chromatography separates and quantifies ions in the sample, while spectrophotometry uses the absorbance of specific wavelengths to identify the ions. Titration methods involve reacting the ions with specific reagents to determine their concentrations.

2 answers


Peak absorbance refers to the wavelength at which a substance absorbs light most strongly. It is commonly used in spectrophotometry to determine the concentration of a substance in a solution by measuring the absorbance at its peak wavelength.

1 answer


The identification is possible using analytical chemistry techniques: atomic absorption spectrometry, ion selective electrodes, gravimetry, potentiometric titration, spectrophotometry and many other.

1 answer


Some common S's in the laboratory include safety, sterile techniques, standards, solutions, syringes, and spectrophotometry. Each plays a crucial role in ensuring accurate and reliable experimental results.

1 answer


Christine A Heenan has written:

'Spectrophotometric and fluorometric determination of fructose, glucose and sucrose after derivatization with zirconyl chloride' -- subject(s): Analytic Chemistry, Chemistry, Analytic, Spectrophotometry

1 answer


Adil O. H. Al-Chalabi has written:

'The study of excited states of aromatic molecules and their complexes using modulation excitation spectrophotometry'

1 answer


We can use spectrophotometry, pH-metry, pH-papers, pH solutions to measure the pH; a simple method is the use of red cabbage juice.

1 answer


Potassium dichromate is used as the primary standard for UV spectrophotometry because of its properties. It is pure, stable, has no waters of hydration, and has a high molar mass.

1 answer


Allan Balfour Calder has written:

'Photometric methods of analysis' -- subject(s): Photometry, Spectrophotometry

'Evaluation and presentation of spectro-analytical results' -- subject(s): Spectrochemistry

1 answer


Nitrate levels in water can be measured using various methods including colorimetry, ion chromatography, and spectrophotometry. These techniques involve chemical reactions or instruments that can detect the presence and concentration of nitrate ions in a sample.

1 answer


The rate of photosynthesis in plants can be measured by monitoring the production of oxygen, the consumption of carbon dioxide, or the production of glucose. This can be done using techniques such as gas exchange measurements, spectrophotometry, or radioactive labeling.

1 answer


yes, just refer to the article- Simultaneous determination of enalapril maleate and hydrochlorothiazide by first-derivative ultraviolet spectrophotometry and high-performance liquid chromatography ( science direct)

1 answer