A new method for the determination of traces of total mercury by using a gold film electrode in salt samples was developed. Table salts are known to contain mercury at ultra-trace level as well as a high quantity of chloride ions that cause severe disturbance during the stripping step when gold is used as the electrode material in voltammetric measurements. The interference of high chloride content in the determination of mercury was eliminated by reducing its concentration down to 3 x 10(-3) mol L(-1) level which is optimum for the determination by using on-line medium exchange procedure immediately after the deposition step. The deposition potential applied to the electrode was maintained at 0.2 V (vs. Ag/AgCl double junction electrode) while the cell content was sucked by a pump and replaced with fresh electrolyte simultaneously. The analyte loss resulted from the air contact of the electrode was prevented by this means. The mercury ions present in the salt samples were collected at +0.2 V for 60 s, the electrolyte was replaced by 0.1 mol L(-1) HClO4 and the potential was scanned, attaining a detection limit of 0.17 microg L(-1), with R.S.D. of 1.2% (S/N=3). The recovery of the method was 94.6%. The performance and accuracy of the method was compared with that of atomic fluorescence spectrometry (AFS). Consequently, this developed method can offer a wide range of application in saline samples.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.talanta.2007.11.044 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Fish-Gill-Inspired Biomimetic Multiscale-Ordered Hydrogel-Based Solar Water Evaporator for Highly Efficient Salt-Rejecting Seawater Desalination.
ACS Appl Mater Interfaces
January 2025
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
Solar energy-driven steam generation is a renewable, energy-efficient technology that can alleviate the global clean water shortage through seawater desalination. However, the contradiction between resistance to salinity accretion and maintaining high water evaporation properties remains a challenging bottleneck. Herein, we have developed a biomimetic multiscale-ordered hydrogel-based solar water evaporator for efficient seawater desalination.
View Article and Find Full Text PDFFine-root and leaf acquisitive traits decoupled from chloride accumulation in reflecting the differential salinity tolerance among hybrids.
Front Plant Sci
January 2025
CSIRO, Glen Osmond, Adelaide, SA, Australia.
Improving crop salinity management requires enhanced understanding of salinity responses of leaf and fine-root traits governing resource acquisition, ideally in relation to ion accumulation at intra- or inter-specific levels. We hypothesized that these responses are coupled towards integrated resource conservation for plants under prolonged salt treatment. We tested the hypothesis with a glasshouse experiment on saplings of six contrasting hybrids, subjected to either control or salt treatment (reverse osmosis water versus 3.
View Article and Find Full Text PDFReceipt of medications for opioid use disorder among rural and urban veterans health administration patients.
Drug Alcohol Depend Rep
March 2025
Center to Improve Veteran Involvement in Care, VA Portland Health Care System, 3710 SW US Veterans Hospital Rd, Portland, OR 97239, United States.
Aim: We examined differences in medications for opioid use disorder (MOUD) receipt between rural and urban veteran patients following initiatives within the US Department of Veterans Affairs (VA) to expand access to MOUD.
Methods: Data for this retrospective cohort study were obtained from the VA Corporate Data Warehouse, which contains national electronic health record data for all VA patients. The analytic sample included all patients diagnosed with OUD from 10/1/2018-9/30/20.
Establishing the Cut-Off Values of 17-Hydroxyprogesterone for Diagnosing Congenital Adrenal Hyperplasia: A Prospective Observational Study in a Tertiary Care Hospital.
Cureus
December 2024
Central Research Service, Bharati Vidyapeeth (Deemed to be University) Medical College, Pune, IND.
Introduction Congenital adrenal hyperplasia (CAH) is an autosomal recessive disorder primarily caused by 21-hydroxylase enzyme deficiency, impairing cortisol synthesis and resulting in elevated androgen levels. CAH presents in two classical forms: salt-wasting (SW) and simple virilizing (SV). Although CAH is rare in India, regional variations and the absence of a national newborn screening (NBS) program pose significant challenges to accurate diagnosis.
View Article and Find Full Text PDFA lanmodulin-based fluorescent assay for the rapid and sensitive detection of rare earth elements.
Analyst
January 2025
Key Laboratory of Green and High-Value Utilization of Salt Lake Resources, State Key Laboratory of Petroleum Molecular & Process Engineering (RIPP, SINOPEC), CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Sensitive and rapid detection methods for rare earth elements (REEs), including lanthanides (Lns), will facilitate the mining and recovery of these elements. Here, we innovated a rapid, highly selective and sensitive fluorescence detection method for Lns, based on Hans-Lanmodulin, a newly discovered protein with high selectivity and binding affinity for rare earth elements. By labelling the fluorescein moiety FITC onto Hans-Lanmodulin, named as FITC-Hans-LanM.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!