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
Email: schalk@unf.edu
Website: @unf

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Michael R. Straka

Abbrev:
Straka, M.R.
Other Names:
Address:
OI Analytical, College Station, Texas, USA
Phone:
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Fax:
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Citations 4

"A New Approach To Cyanide Analysis"
Met. Finish. 1998 Volume 96, Issue 11 Pages 34-36
Michael Straka

Abstract: Recently (Federal Register, Vol. 63, No. 129, July 7,1998) the U.S. EPA proposed amending the Guidelines Establishing Test Procedures for the Anal. of Pollutants under Section 304(h) of the Clean Water Act by adding Method OIA-1677: Available Cyanide by Flow Injection, Ligand Exchange, and Amperometry. This method employs flow injection analysis (FIA) and was developed and validated by ALPKEM, a division of O.I.Anal., in cooperation with the University of Nevada-Reno Mackay School of Mines. According to the Federal Register notice the U.S. EPA considers Method OIA-1677 to be a significant addition to the suite of anal. testing procedures for available cyanide because it (1) has greater specificity for cyanide in matrixes where interferences were encountered using currently approved methods, (2) has improved precision and accuracy compared to currently approved CATC cyanide methods, (3) measures available cyanide at lower concentrations, (4) offers improved analyst safety, (5) shortens sample anal. time, and (6) reduces lab. waste.
Cyanide, free Geological Amperometry Interferences Standard method

"Use Of Segmented Micro-continuous-flow Analysis And FIA In Water Analysis"
Int. Lab. 1990 Volume 20, Issue 7 Pages 33-34
Straka, M.R.

Abstract: Recent developments in these techniques are summarized. The term 'micro-continuous' flow analysis is used to mean that in which the i.d. of the tubing is reduced from 2.4 mm to 1 mm. This change, together with electronic control of the timing, and hence the size, of the segmenting air bubbles, and detector cells that do not require de-bubbling of the analytical stream before spectrophotometry, all contribute to lower dispersion. This permits faster sampling rates (up to 200 h-1) and also reduces the required volume of sample and reagents. The relative merits of µsegmented and non-segmented flow injection analysis are compared, so that the appropriate technique for a chosen application may be selected.
Water Segmented flow Detector

"Guidelines Establishing Test Procedures For The Analysis Of Pollutants; Available Cyanide In Water"
Fed. Regist. 1999 Volume 64, Issue 250 Pages 73414-73423
Mike Straka

Abstract: This final rule amends the Guidelines Establishing Test Procedures for the Anal. of Pollutants under section 304(h) of the Clean Water Act by adding Method OIA-1677: available cyanide by flow injection, ligand exchange, and amperometry (hereafter Method OLA-1677). Method OIA-1677 uses flow injection analysis to measure available cyanide. Method OIA-1677 is an additional test procedure for measuring the same cyanide species as are measured by currently approved methods for cyanide amenable to chlorination (CATC). In some matrixes, CATC methods are subject to test interferences. EPA is approving Method OIA-1677 because it is more specific for available cyanide, is more rapid, measures cyanide at lower concentrations, offers improved safety, reduces lab. waste, and is more precise and accurate than currently approved CATC methods.

"Use Of Segmented Micro-continuous-flow Analysis And FIA In Water Analysis"
Am. Environ. Lab. 1989 Volume 1, Issue 2 Pages 60-63
Straka, M.R.

Abstract: The complementary nature of the methodologies of macrosegmented and microsegmented continuous-flow and nonsegmented FIA is discussed. The relative advantages and disadvantages are highlighted and general guidelines for selection of one technique over another are suggested.
Environmental Water Method comparison Alpkem Review Apparatus