Mineral Analysis of Biological Materials

Griggs, Mary A.; Johnstin, Ruth; Elledge, Bonnie E.

doi:10.1021/i560090a018

Cited by 29 publications

(5 citation statements)

References 5 publications

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“…It exhibits two rather sensitive emission lines in the ultraviolet portion of the spectrum, at 324.7 and 327.4 mg, and possesses a series of weak emission bands in the visible region (S). No thorough study has been reported which deals with the flame spectrophotometric determination of copper, although several investigators have employed the two lines mentioned to determine copper in biological materials (5) and in other substances (4). Lundeg&rdh (7) observed that the emission intensity or luminosity of copper was strongly dependent upon operating conditions, and that both lines were subject to strong self-absorption.…”

Section: Thismentioning

confidence: 99%

“…Selector switch Phototube resistor Slit Acetylene Oxygen Phototube voltage 5 or fi turns from clockwise limit 0.1 22 megohms 0.030 mm. 5 pounds per square inch 6 pounds per square inch 60 volts per dynode Characteristics of Copper in Flame. The general emission pattern of an oxyacetylene flame containing copper over the wave-length region 324 to 330 \µ is shown as Figure 1. Copper exhibits two arc lines at 324.7 and 327.4 mu, Also noticeable in Figure 1 are some band structures due to the flame itself.…”

Section: Sensitivity Controlmentioning

confidence: 99%

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Flame Spectrophotometric Determination of Copper in Nonferrous Alloy

Dean¹

1955

Anal. Chem.

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Section: Thismentioning

confidence: 99%

Section: Sensitivity Controlmentioning

confidence: 99%

Flame Spectrophotometric Determination of Copper in Nonferrous Alloy

Dean¹

1955

Anal. Chem.

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“…Determination of iron by flame spectrographic methods has been discussed by Mitchell (IS) and McClelland and Whalley (11), and has been applied to agricultural materials, water, and blood by Griggs (7), and Griggs, Johnstin, and Elledge (8). These workers used photographic recording in conjunction with a spectrograph.…”

Section: Thismentioning

confidence: 99%

Flame Spectrophotometric Determination of Iron in Siliceous Materials

Dean¹,

Burger²

1955

Anal. Chem.

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This investigation describes the application of the Beckman Model DU flame spectrophotometer to the rapid determination of iron in siliceous materials such as alumina refractories and limestone. The arc emission line at 386.0 mg was used to measure the iron radiation.Cobalt was incorporated in the samples in order that the cobalt 387.1-mg arc line could serve as an internal standard. An oxyacetylene flame was the excitation source.The radiative interference of many elements normally associated with iron in siliceous samples could be corrected by using an internal standard. None of the alkalies or alkaline earths offered interference when present in the amounts usually encountered, and large concentrations of aluminum can be tolerated.Magnesium offers serious interference, and when present, the separation of iron as the hydrous oxide is necessary. The optimum concentration range for iron is between 25 and 200 p.p.m. The standard deviation from the mean of replicate samples is approximately 3%. The method has been successfully applied to limestone and several varieties of alumina refractories.

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“…The construction is described of an inexpensive, simple burner with an all-plastic atomizer and glass chamber similar to those described by Griggs (5). With the use of a Bausch & Lomb medium quartz spectrograph 15 elements can be determined directly or upon the dissolved ash of biological materials with an accuracy of *5%.…”

mentioning

confidence: 99%