Containers, and Sample Preparation Equipment

This ASSURANCE certified ref nce material, CRM, is intended prunaHIy for use as a calibration standard c r quality control standard for inorganic speetrosoopie instrumentation such as ICPOES, DCP, AA, rCPMS, Spectrophotometer and XRF. It can be employed in USEPA, ASTM and other methods relevant to the certified properties listed below. 

Certifled Value Erbium (Er) 1000 mg/L 2.9 mg/L Traceable to NIST SRM 3116a 

The CRM is prepared gravimetrically using high purity Er Oxide (E12O3) Lot 07S32R, The certified value listed is the average of values obtained classical wet assay and ICP spectrometer analysis. 

Method EDTAtitrimetric analysis using Methyl Thymcd Blue as indicatm. EDTA standardized against Pb(N03)j NIST SRM 928. 

Trace Metallic bnpwitia iatte Actaal Satatioo vis ICP/ICrMS Aatdysis  

In addition to the contamination issues, analytes can be absorbed into the walls of volumetric flasks and beakers made of glass. This can be a serious problem if the sample or standard is to be stored for extended periods of time, especially if the 

FIGURE 15.2 Certificate for a 1000 mg/L erbium certified reference standard used in ICP-MS, showing values for over 30 trace metal contaminants (courtesy of SPEX Certiprep). 

Glassware is such a universal material used for sample preparation that it is very difficult to completely avoid it. However, serious consideration should be given to 

Practical Guide to ICP-MS A Tutorial for Beginners, Second Edition 

Some plastics are more inert and more pure than others, so thought should be given as to which one is optimal for your samples. Selection should be made based on the suite of elements being analyzed, analyte concentration levels, matrix components, or whether it is an aqneons-, acid-, or organic-based solution. Some of the most common plastic materials used in the manufacture of sample preparation vessels and sample introduction components inclnde polypropylene (PP), polyethylene (PE), polysulfide (PS), polycarbonate (PC), polyvinylchloride (PVC), polyvinylfluoride (PVF), perfluoroalkoxy (PFA), and polytetrafluoroethylene (PTFE). 

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