PMID- 10334581
OWN - NLM
STAT- MEDLINE
DCOM- 19990614
LR  - 20190722
IS  - 0017-9078 (Print)
IS  - 0017-9078 (Linking)
VI  - 76
IP  - 6
DP  - 1999 Jun
TI  - Comparison of four 90Sr groundwater analytical methods.
PG  - 644-56
AB  - Data are presented for 45 Long Island groundwater samples each measured for 90Sr 
      using four different analytical methods. 90Sr levels were first established by 
      two New York State certified laboratories, one of which used the U.S. 
      Environmental Protection Agency Radioactive Strontium in Drinking Water Method 
      905.0. Three of the 90Sr methods evaluated at Brookhaven National Laboratory can 
      reduce analysis time by more than 50%. They were (a) an Environmental 
      Measurements Laboratory Cerenkov technique and (b) two commercially available 
      products that utilize strontium-specific crown-ethers supported on either a resin 
      or membrane disk. Method independent inter-laboratory bias was <12% based on 90Sr 
      results obtained using both U.S. Department of Energy/Environmental Measurements 
      Laboratory and U.S. EPA/National Environmental Radiation Laboratory samples of 
      known activity concentration. Brookhaven National Laboratory prepared a National 
      Institute of Standards and Technology traceable 90Sr tap-water sample used to 
      quantify test method biases. With gas proportional or liquid scintillation 
      counting, minimum detectable levels (MDLs) of 37 Bq m(-3) (1 pCi L(-1)) were 
      achievable for both crown-ether methods using a 1-L processed sample beta counted 
      for 1 h. The primary radiological contaminants of the Brookhaven National 
      Laboratory groundwater samples were 3H (14.8-518 kBq m(-3)) and 90Sr/Y (37 Bq 
      m(-3)-18.5 kBq m(-3)). Thirty samples were above the U.S. EPA drinking water 
      standard of 300 Bq m(-3) for beta emitting 90Sr. Regression of paired data sets 
      showed that both crown-ether methods quantified 90Sr levels to within 5% of the 
      "EPA method results" for samples greater than the drinking water standard and 
      within 30-40% for samples less than the drinking water standard. The Cerenkov 
      method, with a minimum detectable level of 150 Bq m(-3), was only useful for 
      samples greater than the drinking water standard and underestimated 90Sr levels 
      by 13%. Precision, as measured by the relative percent difference and mean 
      difference statistics, was acceptable for both crown-ether methods when compared 
      to the paired "EPA method" results. Cerenkov method precision exceeded 
      pre-defined acceptance criteria for 12 of 33 samples analyzed.
FAU - Scarpitta, S
AU  - Scarpitta S
AD  - Analytical Services Laboratory of Brookhaven National Laboratory, Upton, NY 
      11973, USA.
FAU - Odin-McCabe, J
AU  - Odin-McCabe J
FAU - Gaschott, R
AU  - Gaschott R
FAU - Meier, A
AU  - Meier A
FAU - Klug, E
AU  - Klug E
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PL  - United States
TA  - Health Phys
JT  - Health physics
JID - 2985093R
RN  - 0 (Strontium Radioisotopes)
RN  - 0 (Water Pollutants, Radioactive)
SB  - IM
MH  - New York
MH  - Quality Control
MH  - Radiation Monitoring/instrumentation/*methods/standards
MH  - Regression Analysis
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Strontium Radioisotopes/*analysis
MH  - United States
MH  - United States Environmental Protection Agency
MH  - Water Pollutants, Radioactive/*analysis
MH  - Water Supply/*analysis
EDAT- 1999/05/20 00:00
MHDA- 1999/05/20 00:01
CRDT- 1999/05/20 00:00
PHST- 1999/05/20 00:00 [pubmed]
PHST- 1999/05/20 00:01 [medline]
PHST- 1999/05/20 00:00 [entrez]
AID - 10.1097/00004032-199906000-00008 [doi]
PST - ppublish
SO  - Health Phys. 1999 Jun;76(6):644-56. doi: 10.1097/00004032-199906000-00008.