Simultaneous determination of zirconium and hafnium in standard rocks by neutron activation analysis

Rebagay, T.V.; Ehmann, W. D.

doi:10.1007/bf02513699

Cited by 11 publications

(7 citation statements)

References 19 publications

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“…Additional details will be published elsewhere. The elements Zr and Hf were determined by thermal neutron activation procedures previously described by Rebagay and Ehmann (1970). The elements Ca, Ti, Mg, S, P, and H20 lost at 110°C were determined by volumetric or gravimetric wet chemical procedures similar to those of Easton and Lovering (l963).…”

Section: Methodsmentioning

confidence: 99%

Chemical Analyses of the Murchison and Lost City Meteorites

et al. 1970

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The abundances of 22 elements have been determined in the recently fallen Murchison and Lost City meteorites. Analyses were performed by 14‐MeV neutron activation, thermal neutron activation, and in a few cases by wet chemical techniques. On the basis of these data the composition of the Murchison chondrite is intermediate between previously reported analyses of Type II and Type III carbonaceous chondrites. The data for the Lost City chondrite in general agree well with mean values reported for H‐group ordinary chondrites. The low oxygen content of the Lost City chondrite suggests that previously reported oxygen abundances in H‐group falls may be too high due to oxidation in storage or weathering prior to collection

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Section: Methodsmentioning

confidence: 99%

Chemical Analyses of the Murchison and Lost City Meteorites

et al. 1970

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“…A c c e p t e d M a n u s c r i p t techniques such as neutron activation [14], polarography [15][16][17], voltammetry [18], ion selective electrode [19], high performance liquid chromatography (HPLC) [4], liquid chromatography [20][21][22], and chelating ion exchange followed by spectrophotometric detection [21] were also reported. UV-Vis spectrophotometric methods have been widely used due to simplicity, rapidity, low costs and wide applications [23][24][25][26].…”

Section: Page 3 Of 30mentioning

confidence: 99%

Novel approach for the determination of zirconium by solid-phase spectrophotometry

Amin

2015

Journal of Taibah University for Science

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Solid-phase spectrophotometry was applied to determine trace amounts of zirconium(IV) in water, soil, plant materials and ore samples. Zr(VI) was sorbed in a dextran type lipophilic gel as a complex with 2-(2-benzothiazolylazo)-3-hydroxyphenol (BTAHP). Resin phase absorbances at 569 and 800 nm were measured directly, which allowed the determination of Zr in the range of 0.25-3.7 μg L −1 with an RSD of 1.06%. The influences of analytical parameters including pH, amounts of BTAHP, and sample volume were investigated. The molar absorptivities were found to be 1.08 × 10 5 , 6.38 × 10 6 , and 1.97 × 10 7 L mol −1 cm −1 for 100, 500, and 1000 mL, respectively. The LOD and LOQ of the 500 mL sample method were 150 and 470 ng L −1 , respectively, when using 40 mg dextran type lipophilic gel. For a 1000 mL sample, the LOD and LOQ were 80 and 240 ng L −1 , respectively. Increasing the sample volume enhanced the sensitivity. No considerable interferences were observed from other investigated anions and cations on the Zr(IV) determination.

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“…Our Zr and Hf data appear to be the first obtained by neutron activation analysis on an ureilite. One Zr determination was made on the powdered sample using the older radiochemical procedure of Rebagay and Ehmann (1970). A high value of 38 ppm Zr was obtained and contamination of the powder sample with respect to Zr is suspected.…”

Section: Discussionmentioning

confidence: 99%