Topic
Detection limit
About: Detection limit is a research topic. Over the lifetime, 34379 publications have been published within this topic receiving 644817 citations. The topic is also known as: limit of detection & lower detection limit.
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TL;DR: A relatively large intra- and inter-individual variation in urinary 8OHdG excretion rates was found, and the method is more sensitive and much faster than the common method using HPLC with electrochemical detection.
90 citations
TL;DR: In this article, a highly sensitive and selective sensor for acetone was demonstrated, which was based on intensive cataluminescence (CTL) emission on the surface of nano-sized La 2 O 3.
Abstract: In the present paper, a highly sensitive and selective sensor for acetone was demonstrated, which was based on intensive cataluminescence (CTL) emission on the surface of nano-sized La 2 O 3 . The CTL characteristics and the optimum conditions for the sensor, including La 2 O 3 morphology, wavelength, working temperature, and airflow rate, were investigated in detail. Under the optimized conditions, the CTL intensity versus concentration of acetone was linear in the range of 0.19–140 μg mL −1 , with a correlation coefficient ( r ) of 0.9981 and a detection limit (signal-to-noise ratio is 3; and noise is the width of baseline) of 0.08 μg mL −1 . The relative standard deviation (R.S.D.) for 9.3 μg mL −1 acetone ( n = 5) was 1.4%. There was no or weak response to common foreign substances, such as ammonia, toluene, benzene, formaldehyde, ethanol, methanol, ethyl acetate, and acetaldehyde. The gas sensor also exhibited good stability and durability for continuously introducing 19 μg mL −1 acetone for 80 h over 8 days, with a long-term R.S.D. less than 5%.
90 citations
TL;DR: A preliminary thinking of in vivo determination of Al is provided in this study, as high performance liquid chromatography with spectrophotometric detection using quercetin, a bioactive substance as a pre-column reagent, is developed.
90 citations
TL;DR: A simple and selective method for the separation and preconcentration of cadmium in water samples based on solidified floating organic drop microextraction (SFODME) was developed and accuracy was assessed through recovery experiment and independent analysis by graphite atomic absorption spectrometry.
90 citations
TL;DR: In this article, the authors used graphite furnace atomic absorption spectrometry (GF AAS) for the direct determination of nickel in crude oil using several sample preparation methods, including Xylene, Isobutyl methyl ketone (IBMK), and an oil-in-water emulsion using Triton X-100 as surfactant.
90 citations