COMMITTEEDRAFT
ISO/CD 15151 | IDF 229
© ISO2010
–
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3
5.6 Internal standardsolution
,
if applicable. For example yttriumwith concentration1000mg/l.
5.7 H
2
O
2
, with a volume fractionof 30%.
6 Apparatus
6.1 General
Clean all glassware and plastic ware, including the microwave digestion vessels, thoroughly with the 10%
nitric acid solution (5.3), rinse three times with water (5.1) and allow to dry. Store the clean glassware and
plasticware ina dust-freeenvironment toensure they are freeof any contaminationwhen used
Usual laboratoryapparatus, and in particular, the following.
6.2 Analytical balance
, capableof weighing to thenearest 1mg, witha readability of 0,1mg.
6.3 One-markvolumetric flasks
, of different nominal capacity.
Complyingwith the requirements of ISO 1042.
6.4
One-markpipettes
,
of different nominal capacity, complyingwith the requirements of ISO 648.
6.5 Micropipettes
, capable of adjusting to between 0,100ml and1,000ml and to between 1ml and 5ml,
with plastic pipette tips.
6.6 Dispensette
, capableof dispensing between1ml and 10ml.
6.7 High-densitypolyethylenebottles
, for storing the standard and sample solutions.
6.8 Silica, platina
or
quartz crucibles
, of capacity between 25ml and 50ml.
6.9
Programmable furnaceoven
, capable of attaining aminimum temperature of
550 °C
25 °C and
capable of programmingaheating rate of 50 °C / h.
The real temperature in the furnace has to be checked, because this temperature may be substantially
different from the adjust temperature.
6.10
Pressurized microwave assisted wet digestion system
, with operator selectable output of
between 0W and 1600Wmicrowave power, provided with temperature and pressure controllers and an air
cooling device, equippedwithappropriate vessels of capacity 75ml, commercially available or equivalent.
6.11 ICP-AES instrument
The instrument shall be equipped with radial plasma as a minimum requirement; axial plasma is equally
acceptable. Background correction shall also be performed when necessary. Settings of the working
conditions (e.g. viewing height, gas flows, RF or plasma power, sample uptake rate, integration time, number
of replicates) shall be optimizedac
cording to themanufacturer’s instructions.
MTE-03
FORWORKINGGROUP/ERPUSEONLY
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