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Determination of phenoxy acid herbicides in water by electron-capture and microcoulometric gas chromatography
D.F. Goerlitz, William L. Lamar
1967, Water Supply Paper 1817-C
A sensitive gas chromatographic method using microcoulometric titration and electron-capture detection for the analysis of 2,4-D, silvex, 2,4,5-T, and other phenoxy acid herbicides in water is described. The herbicides are extracted from unfiltered water samples (800-1,000 ml) by use of ethyl ether ; then the herbicides are concentrated and esterilied....
Availability of ground water in York County, Nebraska
Charles Franklin Keech, V. H. Dreeszen, Philip A. Emery
1967, Water Supply Paper 1839-F
York County, an area of 575 square miles, is situated on an upland plain in southeast Nebraska. Although tributaries of the Big Blue River have eroded valleys into this plain, much of the original surface is still intact and is characterized by broad shallow undrained depressions. The economy is based...
Progress report II: Assays and analyses of pyritic core from Wadi Wassat gossan, Saudi Arabia
William C. Overstreet, Sayyad Moutouq Bahijra, Mohammed A. Fourati, Louis Gonzales
1967, Open-File Report 67-174
Assays of 31 samples of pyritic core from diamond drill holes under gossan at Wadi Wassat, Saudi Arabia, disclosed 0.02 oz/ton gold in five samples, and from0.11 to 1.68 oz/ton silver in 23 samples: The tenors are too low to constitute ores of either metal. Further work is required to...
Geology and petrology of the Greenville quadrangle, Piscataquis and Somerset Counties, Maine
Gilbert H. Espenshade, Eugene L. Boudette
1967, Bulletin 1241-F
In the Greenville quadrangle, west-central Maine, slate, siltstone, and sandstone (calcareous and noncalcareous) of probable Silurian to Early Devonian age are intruded by a large mafic pluton and two granitic stocks of probable Early Devonian age. Ages of the sedimentary rocks are based upon tentative correlations with fossiliferous beds in...