NH 4 NO 3 extractable trace element contents of soil samples prepared for proficiency testing - a stability study

2001 ◽  
Vol 370 (2-3) ◽  
pp. 270-274 ◽  
Author(s):  
H. Traub ◽  
Holger Scharf
Keyword(s):  
Trace Element ◽  
Proficiency Testing ◽  
Stability Study ◽  
Soil Samples ◽  
Trace Element Contents ◽  
Element Contents

scholarly journals Trace element contents of plants as a function of readily soluble soil trace elements

1969 ◽  
Vol 41 (1) ◽  
pp. 60-67
Author(s):  
Mikko Sillanpää ◽  
Esko Lakanen
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Ammonium Acetate ◽  
Soil Samples ◽  
Clay Soils ◽  
Trace Element Contents ◽  
Element Contents ◽  
Mineral Soils ◽  
Soil Trace Elements ◽  
Soil Groups

The use of acid ammonium acetate (pH 4.65) as an extractant for plant available trace elements (Mg included) was studied on a total of 216 soil samples and of timothy samples from corresponding sites. Significant correlations between the results of soil and plant analyses were obtained for the eight elements studied in following soil groups: (1) Clay soils: Ni, Co, Cu (2) Coarse mineral soils: Ni, Co, Pb, Mg, Mo (3) Mineral soils (Groups 1 + 2): Ni, Co, Pb, Cu, Mo, Zn (4) Organogenic soils: Ni, Co, Pb, Mg, Mn (5) Whole material: Ni, Co, Pb, Cu, Mg, Mn, Mo, Zn.

Trace Element Contents in Thyroid Cancer Investigated by Instrumental Neutron Activation Analysis

2018 ◽  
Vol 1 (1) ◽  
pp. 1-13
Keyword(s):  
Thyroid Cancer ◽  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Trace Element ◽  
Thyroid Tissue ◽  
Tissue Levels ◽  
Trace Element Contents ◽  
Element Contents

Background: Thyroid cancer is an internationally important health problem. The aim of this exploratory study was to evaluate whether significant changes in the thyroid tissue levels of Ag, Co, Cr, Fe, Hg, Rb, Sb, Sc, Se, and Zn exist in the malignantly transformed thyroid. Methods: Thyroid tissue levels of ten trace elements were prospectively evaluated in 41 patients with thyroid malignant tumors and 105 healthy inhabitants. Measurements were performed using non-destructive instrumental neutron activation analysis with high resolution spectrometry of long-lived radionuclides. Tissue samples were divided into two portions. One was used for morphological study while the other was intended for trace element analysis. Results: It was found that contents of Ag, Co, Cr, Hg, and Rb were significantly higher (approximately 12.8, 1.4, 1.6, 19.6, and 1.7 times, respectively) in cancerous tissues than in normal tissues. Conclusions: There are considerable changes in trace element contents in the malignantly transformed tissue of thyroid.

Trace-Element Contents of Serum, Urine, and Kidney Stones in Urinary Stone Formers

Urolithiasis ◽  
1989 ◽  
pp. 229-231
Author(s):  
J. Hofbauer ◽  
I. Steffan ◽  
H. Schwetz ◽  
G. Vujicic ◽  
O. Zechner
Keyword(s):  
Trace Element ◽  
Kidney Stones ◽  
Urinary Stone ◽  
Stone Formers ◽  
Trace Element Contents ◽  
Element Contents

Environmental assessment of potential toxic trace element contents in the inundated floodplain area of Tablas de Daimiel wetland (Spain)

2016 ◽  
Vol 39 (5) ◽  
pp. 1159-1177 ◽  
Author(s):  
R. Jiménez-Ballesta ◽  
F. J. García-Navarro ◽  
S. Bravo ◽  
J. A. Amorós ◽  
C. Pérez-de-los-Reyes ◽  
...  
Keyword(s):  
Trace Element ◽  
Environmental Assessment ◽  
Trace Element Contents ◽  
Element Contents ◽  
Floodplain Area ◽  
Toxic Trace Element

Assessment of sampling and analytical uncertainty of trace element contents in arable field soils

2011 ◽  
Vol 184 (7) ◽  
pp. 4517-4538 ◽  
Author(s):  
Uwe Buczko ◽  
Rolf O. Kuchenbuch ◽  
Walter Übelhör ◽  
Ludwig Nätscher
Keyword(s):  
Trace Element ◽  
Analytical Uncertainty ◽  
Arable Field ◽  
Field Soils ◽  
Trace Element Contents ◽  
Element Contents

Minor elements in olivine from spinel lherzolite xenoliths: implications for thermobarometry

1997 ◽  
Vol 61 (405) ◽  
pp. 257-269 ◽  
Author(s):  
Suzanne Y. O'Reilly ◽  
D. Chen ◽  
W. L. Griffin ◽  
C. G. Ryan
Keyword(s):  
Trace Element ◽  
Garnet Peridotite ◽  
Spinel Peridotite ◽  
Spinel Lherzolite ◽  
Proton Microprobe ◽  
Minor Elements ◽  
Spinel Lherzolites ◽  
Peridotite Xenoliths ◽  
Trace Element Contents ◽  
Element Contents

AbstractThe proton microprobe has been used to determine contents of Ca, Ti, Ni, Mn and Zn in the olivine of 54 spinel lherzolite xenoliths from Australian and Chinese basalts. These data are compared with proton-probe data for Ni, Mn and Zn in the olivine of 180 garnet peridotite xenoliths from African and Siberian kimberlites. Fe, Mn, Ni and Zn contents are well-correlated; because the spinel lherzolite olivines have higher mean Fe contents than garnet peridotite olivines (average Fo89.6vs. Fo90–92) they also have lower Ni and higher Mn contents. Zn and Fe are well-correlated in garnet peridotite olivine, but in spinel peridotites this relationship is perturbed by partitioning of Zn into spinel. None of these elements shows significant correlation with temperature. Consistent differences in trace-element contents of olivines in the two suites is interpreted as reflecting the greater degree of depletion of Archean garnet peridotites as compared to Phanerozoic spinel lherzolites. Ca and Ti contents of spinel-peridotite olivine are well correlated with one another, and with temperature as determined by several types of geothermometer. However, Ca contents are poorly correlated with pressure as determined by the Ca-in-olivine barometer of Köhler and Brey (1990). This reflects the strong T-dependence of this barometer: the uncertainty in pressure (calculated by this method) which is produced by the ±50°C uncertainty expected of any geothermometer is ca ± 8 kbar, corresponding to the entire width of the spinel-lherzolite field at 900–1200°C.

Sign in / Sign up

Export Citation Format

Share Document