How do you calibrate atomic absorption spectrophotometer?
Answers from top 7 papers
More filters
Papers (7) | Insight |
---|---|
The calculation algorithm suggested provides linearization of the calibration curves in high-resolution continuum source electrothermal atomic absorption spectrometry. | |
63 Citations | This atomic absorption method provides substantial improvement in sensitivity, adequate accuracy, and acceptable precision, and little sample preparation is required before the analysis. |
35 Citations | For the first time in an atomic absorption technique, samples and related standards were used in the emission source instead of an absorption source, and a high degree of accuracy and precision was obtained. |
16 Citations | Therefore, the more frequent use of radiotracers in investigations aimed at improving the accuracy of atomic absorption spectrometric methods would be beneficial. |
22 Citations | The method is simple and rapid and compares favourably with the atomic absorption procedure based on absorbance ratios. |
15 Citations | The proposed system allows the determination of 60 test samples in 1 h and it can be easily adapted to conventional atomic absorption spectrometers. |
18 Citations | The equation is shown to be applicable in fitting the analytically useful concentration range of atomic absorption calibration curves. |
Related Questions
How to calibrate dissolve oxygen meter?5 answersTo calibrate a dissolved oxygen meter, various methods can be employed based on the type of meter. One approach involves using a dissolved oxygen metering calibrating device with a constant temperature water bath groove and a fluorescence method standard electrode. Another method is the calibration of a portable electrochemical-process dissolved oxygen meter, which can be done accurately and rapidly without constant-temperature experimental conditions, allowing on-site calibration without detachment. Additionally, a tectorial membrane electrode dissolved oxygen meter online calibration device utilizes oxygen and nitrogen cylinders to control gas flow and calibrate electrodes based on readings from standard and calibrated electrodes. Furthermore, a trace dissolved oxygen meter online calibration and measurement system enables zero and range calibration online, providing accurate measurements and reliable data for water systems.
How to best calibrate a tribometer?5 answersThe best way to calibrate a tribometer involves using different methods and techniques. One approach is to use a uniquely designed sanding pad with a hard-back sandpaper surface, along with a separate sander member that has a test foot mounting element. Another method involves developing a reciprocating tribometer that simulates cryogenic fluid lubrication and uses a transfer structure of force-deformation to eliminate the negative influence of low temperatures on force sensors. Additionally, an intrinsically calibrating friction mensuration device can be used, which includes a drive unit with a controllable motive member and a force sensor to measure the tractive force between the drive unit and the test piece. Another option is to develop a tribometer for studying journal bearings under micro-load, which utilizes load counterpoise and laser displacement and friction force measurement techniques. Finally, a pin-on-plate tribometer can be used to measure the coefficient of friction of cartilage, with an algorithm developed to account for surface irregularities.
What is the working principle of atomic absorption spectrophotometry?4 answersAtomic absorption spectrophotometry works by measuring the absorption of light by atoms in a sample. The method involves passing radiation from a light source through the atomic vapor of the sample, and then measuring the optical density of the vapor. This measurement allows for the determination of the concentration of specific elements in the sample. To improve the accuracy of the measurements, various techniques are employed. One approach is to correct for nonselective absorption by alternately passing the radiation from a hollow cathode lamp and a continuous spectrum lamp through the atomic vapor. The correction degree of nonselective absorption is determined for specific moments of the hollow cathode lamp. Another method involves passing the emission from continuous or discontinuous spectrum sources through the atomic vapor and determining the optical density of nonselective absorption using different samples with known concentrations. These techniques help to enhance the accuracy of atomic absorption measurements.
How do you create a calibration curve?5 answersA calibration curve is created by analyzing standard samples with known concentrations and measuring their corresponding response values. The process involves sequentially analyzing the standard samples in ascending order of concentration. The coagulation time or component amounts are calculated based on the measurement data obtained from the samples. The relationship between the response values and the concentrations is then expressed in the form of a calibration curve. Various methods can be used to create the calibration curve, such as independent component analysis and similarity evaluation. The calibration curve is essential for determining the concentration of unknown samples by comparing their response values to the curve.
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.
When should you calibrate your combustion analyzer?5 answers