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Solid samples

For solid samples, analysis of the major oxide components of whole rocks and minerals is most useful. The laboratory carries out three procedures,which differ with respect to the number of chemical components analyzed and the format in which the totals are presented. Subsequent to sample digestion, the following trace elements are routinely analyzed: Ag, As, Au, Ba, Be, Bi, Cd, Co, Cr, Cs, Cu, Hg, Mo, Ni, Pb, Rb, Sb, Sc, Sr, V, Zn and the rare earth elements La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y using ICP-MS after fusion. Fourteen trace elements Sn, Nb, Zr, Y, Cr, Zn, Cu, Ni, Pb, As, Mo, Zr, Sr, U, and Rb are determined by X-ray fluorescence without fusion of the sample using compressed pellets prepared from the powdered rock. It is possible to add Ti, V, Bi, Th and W to this list of elements. For the preparation and analysis of solid samples, the Central laboratory is equipped with Retsch BB1, BB2 and BB300 jaw crushers, Retsch SK-1 hammer mill, Siebtechnik TS 100A vibrating mill, Perkin-Elmer AAnalyst 100, 200 atomic absorbtion (flame) spectrometers, AMA 254 mercury analyzer, Eltra CS 500 analyzer for C, S and CO2, modern equipment for preparation of deionized water, ARL 9400 Advant XP wave-dispersive XRF spectrometer, ICP-MS Thermo Scientific X-series 2, Radiometer automatic titrators and pX-meter.

Water analyses

Comprehensive analyses of various types of surface and precipitiation-derived waters are also carried out in the Central laboratory. Routine analysis of water includes determination of the following components: Li, Na, K, NH4, Mg, Ca, Mn, Zn, Fe, Al, SiO2, pH, F, Cl, HCO3, SO4, NO3, together with the conductivity and the turbidity of the sample. Trace elements, total organic carbon and total nitrogen in waters can also be determined. The laboratory does not provide sample collection services, but for accredited analysis of waters requires that the date of collection be specified. The laboratory is equipped with the following instruments: Radelkis pH, pX and conductivity meters, AMA 254 mercury analyzer, Perkin-Elmer spectrophotometer Lambda 25, liquid chromatograph with suppression Knauer 1000, Perkin-Elmer AAnalyst 100, 200 flame spectrometers, Perkin-Elmer 4100 AA spectrometer with electrothermal atomizer, ICP-MS Thermo Scientific X-series 2, Tekmar-Dohrmann Apollo 9000 total organic carbon and nitrogen analyzer.

Non-accredited methods

Additionally, the laboratory carries out a number of specific analytical procedures at the request of customers. Geochemical analyses of plant material e.g. needles, peat, leaves and wood, as well as sludge and waste waters can all be done. The results are classified as non-accredited. This type of non-accredited analysis includes: the determination of trace elements in solid samples V, Cr, Ni, Cu, Zn, As, Rb, Sr, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Sr, Sc, Ba (ICP-MS, fusion), trace elements (Ti,), V, Cr, Ni, Cu, Zn, As, Rb, Sr, Y, Zr, Nb, Mo, Sn, Pb, Bi, Th, U, W (XRF pressed pellets), trace elements As, Sb, Bi (HGAAS). The laboratory carries out crushing, grinding and drying of samples, determination of organic carbon and total nitrogen in waters and analyses of a suite of elements in water samples by ICP-MS (Na, K, Mg, Ca, Li, Mn, Fe, Zn, Sr, Al, Cu, Pb, As, Cd, Be, Co, Cr, Mo, Ni, V, Ba). The laboratory does not provide sample collection services.

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Czech Geological Survey
Geologická 577/6
152 00 Praha 5
phone: +420251085422
fax: +420 251 818 748
vera.zoulkova@geologycz