BS EN ISO 17294-2:2016

This part of ISO17294 specifies a method for the determination of the elements aluminium, antimony, arsenic, barium, beryllium, bismuth, boron, cadmium, caesium, calcium, cerium, chromium, cobalt, copper, dysprosium, erbium, gadolinium, gallium, germanium, gold, hafnium, holmium, indium, iridium, iron, lanthanum, lead, lithium, lutetium, magnesium, manganese, mercury, molybdenum, neodymium, nickel, palladium, phosphorus, platinum, potassium, praseodymium, rubidium, rhenium, rhodium, ruthenium, samarium, scandium, selenium, silver, sodium, strontium, terbium, tellurium, thorium, thallium, thulium, tin, tungsten, uranium and its isotopes, vanadium, yttrium, ytterbium, zinc and zirconium in water (for example, drinking water, surface water, ground water, waste water and eluates). Taking into account the specific and additionally occurring interferences, these elements can also be determined in digests of water, sludges and sediments (for example, digests of water as described in ISO15587‑1 or ISO15587‑2 ). The working range depends on the matrix and the interferences encountered. In drinking water and relatively unpolluted waters, the limit of quantification ( xLQ) lies between 0,002µg/l and 1,0µg/l for most elements (see Table1). The working range typically covers concentrations between several pg/l and mg/l depending on the element and pre-defined requirements. The quantification limits of most elements are affected by blank contamination and depend predominantly on the laboratory air-handling facilities available on the purity of reagents and the cleanliness of glassware. The lower limit of quantification is higher in cases where the determination suffers from interferences (see Clause5) or memory effects (see ISO17294‑1:2004 , 8.2). Table1 Lower limits of quantification ( xLQ) for unpolluted water Element Isotope often used Limit of quantification a µg/l Element Isotope often used Limit of quantification a µg/l Element Isotope often used Limit of quantification a µg/l Ag 107Ag 0,5 Hf 178Hf 0,1 Ru 102Ru 0,1 109Ag 0,5 Hg 202Hg 0,05 Sb 121Sb 0,2 Al 27Al 1 Ho 165Ho 0,1 123Sb 0,2 As 75As c 0,1 In 115In 0,1 Sc 45Sc 5 Au 197Au 0,5 Ir 193Ir 0,1 Se 77Se c 1 B 10B 1 K 39K C 5 78Se c 0,1 11B 1 La 139La 0,1 82Se 1 Ba 137Ba 3 Li 6Li 10 Sm 147Sm 0,1 138Ba 0,5 7Li 1 Sn 118Sn 1 Be 9Be 0,1 Lu 175Lu 0,1 120Sn 1 Bi 209Bi 0,5 Mg 24Mg 1 Sr 86Sr 0,5 Ca 43Ca 100 25Mg 10 88Sr 0,3 44Ca 50 Mn 55Mn 0,1 Tb 159Tb 0,1 40Ca 10 Mo 95Mo 0,5 Te 126Te 2 Cd 111Cd 0,1 98Mo 0,3 Th 232Th 0,1 114Cd 0,5 Na 23Na 10 Tl 203Tl 0,2 Ce 140Ce 0,1 Nd 146Nd 0,1 205Tl 0,1 Co 59Co 0,2 Ni 58Nic 0,1 Tm 169Tm 0,1 Cr 52Crc 0,1 60Nic 0,1 U 238U 0,1 53Cr 5 P 31P 5 235U 10-4 Cs 133Cs 0,1 Pb 206Pb b 0,2 234U 10-5 Cu 63Cu 0,1 207Pb b 0,2 V 51V c 0,1 65Cu 0,1 208Pb b 0,1 W 182W 0,3 Dy 163Dy 0,1 Pd 108Pd 0,5 184W 0,3 Er 166Er 0,1 Pr 141Pr 0,1 Y 89Y 0,1 Fe 56Fe c 5 Pt 195Pt 0,5 Yb 172Yb 0,2 Ga 69Ga 0,3 Rb 85Rb 0,1 174Yb 0,2 71Ga 0,3 Re 185Re 0,1 Zn 64Zn 1 Gd 157Gd 0,1 187Re 0,1 66Zn 1 158Gd 0,1 Rh 103Rh 0,1 68Zn 1 Ge 74Ge 0,3 Ru 101Ru 0,2 Zr 90Zr 0,2 a Depending on the instrumentation, significantly lower limits can be achieved. b In order to avoid incorrect results due to the varying isotop ratios in the environment, the signal intensities of 206Pb, 207Pb and 208Pb shall be added. c In order to reach these limits, depending on interferences, the use of a collision/reaction cell is recommended