University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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NIST 1632

Classification: Reference Material -> NIST -> 1632 -> Bituminous coal

Citations 2

"Flow Injection Spectrofluorimetric Determination Of Sulfate Using Calcein And Zirconium"
Anal. Chim. Acta 1994 Volume 298, Issue 3 Pages 401-404
N. Chimpalee, D. Chimpalee, S. Suparuknari, B. Boonyanitchayakul and D. Thorburn Burns

Abstract: Sulphate can be determined spectrofluorimetrically (lambdaem = 505 nm, lambdaex = 410 nm) based on the formation of a ternary complex between sulphate, zirconium and calcein in a flow-injection system. The carrier stream was deionised water and the reagent streams were 100 µg mL-1 Zr (as ZrOCl2) in 1% (v/v) hydrochloric acid, and 40 µg mL-1 calcein in 0.1 M potassium hydroxide. The injection rate was 50 h-1. The calibration graph was linear up to 25 µg mL-1 SO2-4 based on 250 µL injection volumes. The relative standard deviation (n = 10) was 1.95% for 10 µg mL-1 SO2-4; the detection limit was 0.82 µg mL-1 SO2-4. The system has been applied to the determination of sulphur in NIST coal samples after oxygen bomb combustion.
Sulfate Fluorescence Indirect

"The Use Of Reference Materials In The Fossil Fuels Quality Control"
Microchim. Acta 1996 Volume 123, Issue 1-4 Pages 217-230
Maurizio Bettinelli, Sandro Spezia, Umberto Baroni and Gabriele Bizzarri

Abstract: Quality control procedures used for the determination of trace elements in fuel oil and coal are described. Two standard reference materials (NIST 1632a and 1632b) were used to evaluate the accuracy in the determination of As, Hg and Se in coal by flow injection (FI) hydride-generation (HG) AAS and FI HG ICP-MS after microwave solubilization (Anal. Chim. Acta, 1989, 225, 159). RSD over 2 years were 10% for As, 8.11% for Se and 15% for Hg. The use of real fuel oil samples to compare results obtained for the determination of Ni and V by NAA, ICP-MS, ETAAS and ICP-AES in 54 laboratories is discussed. Similarly, the use of real samples to detect significant bias in the determination of As, Hg and Se in coal using various techniques (NAA, FI HG AAS, FI HG ICP-MS, ETAAS) is discussed.
Trace elements Arsenic Mercury Selenium Nickel Vanadium Sample preparation Spectrophotometry Spectrophotometry Mass spectrometry Mass spectrometry Reference material Method comparison