scispace - formally typeset
Search or ask a question
Topic

Calibration curve

About: Calibration curve is a research topic. Over the lifetime, 6552 publications have been published within this topic receiving 95128 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, a novel and alternative FTIR calibration method was proposed to quantify gases unknown concentrations are deducted from calibration curves, obtained by combining a dilution flow with another flow of the gas of interest Both streams are controlled by accurate flow meters.

55 citations

Journal ArticleDOI
TL;DR: The method was applied to some samples of synovial effusion from patients affected by rheumatoid arthritis and the concentrations of adenosine which were found were included in the range of the calibration curve, demonstrating the efficacy of the method in terms of precision and accuracy.

54 citations

Journal ArticleDOI
TL;DR: The results demonstrate that CF-LIBS is an appropriate technique for quantitative analysis where reference/standard samples are not available to make the calibration curve and also used the traditional calibration curve approach to quantify these elements.
Abstract: Industrial waste is one of the main causes of environmental pollution. Laser-induced breakdown spectroscopy (LIBS) was applied to detect the toxic metals in the sludge of industrial waste water. Sludge on filter paper was obtained after filtering the collected waste water samples from different sections of a water treatment plant situated in an industrial area of Kanpur City. The LIBS spectra of the sludge samples were recorded in the spectral range of 200 to 500 nm by focusing the laser light on sludge. Calibration-free laser-induced breakdown spectroscopy (CF-LIBS) technique was used for the quantitative measurement of toxic elements such as Cr and Pb present in the sample. We also used the traditional calibration curve approach to quantify these elements. The results obtained from CF-LIBS are in good agreement with the results from the calibration curve approach. Thus, our results demonstrate that CF-LIBS is an appropriate technique for quantitative analysis where reference/standard samples are not available to make the calibration curve. The results of the present experiment are alarming to the people living nearby areas of industrial activities, as the concentrations of toxic elements are quite high compared to the admissible limits of these substances.

54 citations

Journal ArticleDOI
TL;DR: In this paper, a flow injection system was developed for on-line sorbent extraction preconcentration and flame atomic absorption spectrometric determination of cadmium in natural water samples.
Abstract: A flow injection system was developed for on-line sorbent extraction preconcentration and flame atomic absorption spectrometric determination of cadmium in natural water samples. The non-charged cadmium complex with diethyl-dithiophosphate (DDPA) was formed on-line in 0.1 mol L−1 HNO3 and retained on the hydrophobic poly-chlorotrifluoroethylene (PCTFE) sorbent material. The adsorbed complex was eluted with isobutyl methylketone (IBMK) and injected directly into the nebulizer via a flow compensation unit. All major chemical and flow parameters affecting the complex formation adsorption and elution as well as interference were studied and optimized. By processing 2.4 mL of sample, the enhancement factor was 39 and the sampling frequency was 50 h−1. For 30 s preconcentration time the detection limit was 0.3 µg L−1 and the relative standard deviation at 5.0 µg L−1 Cd concentration level was 2.9%. The calibration curve was linear in the range 0.8–40.0 µg L−1. The accuracy of the method was estimated by analyzing a certified reference material NIST-CRM 1643d (Trace elements in water). Good recoveries were obtained for spiked natural-water and waste-water samples.

54 citations

Journal ArticleDOI
TL;DR: The relationship between absorbance A and protein concentration P has been shown to follow the relationship A = P × (aP + b)−1, where a and b are constants, for protein concentrations up to 1.0 mg/ml.

54 citations


Network Information
Related Topics (5)
High-performance liquid chromatography
47.3K papers, 1M citations
90% related
Mass spectrometry
72.2K papers, 2M citations
88% related
Aqueous solution
189.5K papers, 3.4M citations
78% related
Reagent
60K papers, 1.2M citations
78% related
Particle size
69.8K papers, 1.7M citations
76% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023210
2022508
2021137
2020213
2019234
2018216