NDLI: Flow injection on-line sorbent extraction pre-concentration for graphite furnace atomic absorption spectrometry

Content Provider	Royal Society of Chemistry (RSC)
Author	Fang, Zhaolun Sperling, Michael Welz, Bernhard
Copyright Year	1990
Abstract	Flow injection (FI) techniques were used to develop an efficient on-line sorbent extraction pre-concentration system for graphite furnace atomic absorption spectrometry with lead as a model trace element. Bonded silica with octadecyl functional groups (C18) was used as sorbent in a 15-µl conically shaped micro-column. The lead diethyldithiocarbamate chelate was formed on-line, loaded on to the column for 60 s, washed with de-ionised water and eluted with ethanol into a collector with a volume of 75 µl, made from 0.35 mm i.d. polytetrafluoroethylene tubing. The collected eluate was introduced into the graphite tube by an air flow on initiation of the FI system for pre-concentration of the next sample. The reproducibility of FI peak gradients was exploited through precise timing of the collection of the eluate fraction so that end sections of the eluate bolus containing lower analyte concentrations were discarded. A 26-fold enhancement in peak area compared with 50 µl direct introduction was obtained with 60-s pre-concentration while achieving a precision of 1.9% relative standard deviation for 0.1 µg l–1 of Pb (n= 11), and a detection limit of 0.003 µg l–1(3σ). The complete cycle of operation was 150 s which conveniently fitted into the time interval between successive graphite furnace firings. Determination of Pb in sea water samples showed that the interfering matrix had been almost completely removed during the pre-concentration, and determinations were made without using chemical modifiers. Results obtained for National Research Council of Canada Standard Reference Materials CASS 1, CASS 2 [Seawater (Coastal)] and NASS 1 [Seawater (Open Ocean)] using matrix-matched standards and for the SLRS 1 Riverine Water using simple aqueous standards agreed well with certified values.
Starting Page	639
Ending Page	646
Page Count	8
File Format	PDF
ISSN	02679477
Volume Number	5
Issue Number	7
Journal	Journal of Analytical Atomic Spectrometry
DOI	10.1039/JA9900500639
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	National Research Council of Canada Standard Reference Materials CASS NASS SLRS Adsorption Graphite furnace atomic absorption Trace element Silicon dioxide Ethanol Polytetrafluoroethylene Graphite Analyte Direct Introduction Coefficient of variation Lead Composite material National Scientific and Technical Research Council Canada
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Analytical Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Use of a furnace with a graphite filter for electrothermal atomic absorption spectrometry

Determination of ultra-trace levels of metal ions in sea-water with on-line pre-concentration and electrothermal atomic absorption spectrometry

Determination of Trace Amounts of Lead by Modified Graphite Furnace Atomic Absorption Spectrometry after Liquid Phase Microextraction with Pyrimidine-2-thiol

Investigation of Distribution for Trace Lead and Cadmium in Chinese Herbal Medicines and Their Decoctions by Graphite Furnace Atomic Absorption Spectrometry

Determination of Trace Levels of Selenium in Biological Samples by Graphite Furnace Atomic Absorption Spectrometry with a Solid Sampling Technique. Application of Pre-Ashing Concentration Technique

Flow injection on-line separation and preconcentration for electrothermal atomic absorption spectrometry. Part 2. Determination of ultra-trace amounts of cobalt in water

Combination of hydride generation and graphite furnace atomic absorption spectrometry for the determination of lead in biological samples

Determination of lead by hydride generation atomic absorption spectrometry with in situ, concentration in a zirconium coated graphite tube

Evaluation of solid sampling-electrothermal vaporization-inductively coupled plasma mass spectrometry and solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of Cr in various materials using solution-based calibration approaches

Flow injection on-line sorbent extraction pre-concentration for graphite furnace atomic absorption spectrometry

Similar Documents

Use of a furnace with a graphite filter for electrothermal atomic absorption spectrometry

Determination of ultra-trace levels of metal ions in sea-water with on-line pre-concentration and electrothermal atomic absorption spectrometry

Determination of Trace Amounts of Lead by Modified Graphite Furnace Atomic Absorption Spectrometry after Liquid Phase Microextraction with Pyrimidine-2-thiol

Investigation of Distribution for Trace Lead and Cadmium in Chinese Herbal Medicines and Their Decoctions by Graphite Furnace Atomic Absorption Spectrometry

Determination of Trace Levels of Selenium in Biological Samples by Graphite Furnace Atomic Absorption Spectrometry with a Solid Sampling Technique. Application of Pre-Ashing Concentration Technique

Flow injection on-line separation and preconcentration for electrothermal atomic absorption spectrometry. Part 2. Determination of ultra-trace amounts of cobalt in water

Combination of hydride generation and graphite furnace atomic absorption spectrometry for the determination of lead in biological samples

Determination of lead by hydride generation atomic absorption spectrometry with in situ, concentration in a zirconium coated graphite tube

Evaluation of solid sampling-electrothermal vaporization-inductively coupled plasma mass spectrometry and solid sampling-graphite furnace atomic absorption spectrometry for the direct determination of Cr in various materials using solution-based calibration approaches

Flow injection on-line sorbent extraction pre-concentration for graphite furnace atomic absorption spectrometry