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TraceElementsinNaturalWater,标准物质

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This Standard Reference Material (SRM) is intended for use in evaluating methods used in the determination of
trace elements in freshwater. SRM1640a consists of acidified spring water with mass fractions and mass
concentrations assigned for 29 elements, 22 of which were gravimetrically added. The solution contains nitric acid
at a volume fraction of approximately 2 %. A unit of SRM1640a consists of 250 mL of solution in a high-density
polyethylene (HDPE) bottle sealed inside an aluminized Mylar pouch.
Certified values
Ag .............. 8.017 ± 0.042 μg/kg   Co ................. 20.08 ± 0.24 μg/kg   Se ................ 19.97 ± 0.16 μg/kg
Al...................... 52.6 ± 1.8 μg/kg   Cu ................. 85.07 ± 0.48 μg/kg    Sr ............... 125.03 ± 0.86 μg/kg
As............... 8.010 ± 0.067 μg/kg   Fe ..................... 36.5 ± 1.7 μg/kg    Tl ................ 1.606 ± 0.015 μg/kg
B .................... 300.7 ± 3.1 μg/kg   Mn ................ 40.07 ± 0.35 μg/kg    U .................. 25.15 ± 0.26 μg/kg
Ba ............. 150.60 ± 0.74 μg/kg    Mo ................ 45.24 ± 0.59 μg/kg    V .................. 14.93 ± 0.21 μg/kg
Be .............. 3.002 ± 0.027 μg/kg   Ni .................. 25.12 ± 0.12 μg/kg   Zn ................. 55.20 ± 0.32 μg/kg
Cd .............. 3.961 ± 0.072 μg/kg   Pb ............. 12.005 ± 0.040 μg/kg
Cr ................. 40.22 ± 0.28 μg/kg   Sb ............... 5.064 ± 0.045 μg/kg
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