Version 10.0 – July 2014
22
ENVIRONMENTAL MATRIX MATERIALS
Description Unit Size
DRINKING WATER MATERIALS
Hard drinking water was sourced from Tamworth (Staffordshire, UK) potable mains
supply. The water was filtered through a 0.2µm in-line filter and acidified to
approximately 0.1% nitric acid.
This material is intended for use in development, validation or quality control of
analytical methods for the determination of elements in hard drinking water.
Certified Values
Aluminium ....................... 209 ± 11 µg/L Lead .......................... 24.51 ± 0.52 µg/L
Antimony ...................... 5.11± 0.23 µg/L Magnesium ............... 14.78 ± 0.48 mg/L
Arsenic ...................... 10.15 ± 0.34 µg/L Manganese ....................48.3 ± 1.6 µg/L
Barium .......................... 115.2 ± 3.7µg/L Molybdenum ................ 5.45 ± 0.33 µg/L
Beryllium ........................ 5.01± 4.1 µg/L Nickel ......................... 19.27 ± 0.68 µg/L
Boron .............................. 952 ± 48 µg/L Potassium ................... 5.11 ± 0.16 mg/L
Cadmium ..................... 4.88 ± 0.19 µg/L Selenium ...................... 9.91 ± 0.41 µg/L
Calcium ........................ 73.6 ± 2.7 mg/L Sodium ..................... 22.77 ± 0.78 mg/L
Chromium ...................... 48.2 ± 1.6 µg/L Strontium ........................ 471 ± 21 µg/L
Cobalt .......................... 4.82 ± 0.28 µg/L Vanadium .................... 4.75 ± 0.34 µg/L
Copper .......................... 1936 ± 75 µg/L Zinc ................................. 597 ± 19 µg/L
Iron .................................. 186 ± 11 µg/L
A supply of tap water (Teddington, UK) was collected, and copper sulfate was added
as a biocide at a final concentration of 1 mg/L (as copper). The water was then
filtered through 1 µm cellulose filters. The base levels of the analytes were measured
and high purity salts were added gravimetrically to achieve anion concentrations in
the water approximating to the maximum permissible levels specified in EU/UK
drinking water regulations (EC directive 98/83/EC).
This material is intended for use in validating methods and for confirming instrument
calibration for anions in drinking water.
Certified Values
Chloride ............................ 247 ± 8 mg/L Nitrate ................................ 45 ± 3 mg/L
Fluoride .......................... 1.3 ± 0.1 mg/L Sulfate ..............................247 ± 7 mg/L
Indicative Value
Ammonium ........................... 0.44 mg/L
A supply of tap water (Plymouth, UK) was collected, and copper sulfate was added
as a biocide at a final concentration of 1 mg/L (as copper). The water was then
filtered through 1 µm cellulose filters. The base levels of the analytes were measured
and high purity salts were added gravimetrically to achieve anion concentrations in
the water approximating to the maximum permissible levels specified in EU/UK
drinking water regulations (EC directive 98/83/EC).
This material is intended for use in validating methods and for confirming instrument
calibration for anions in drinking water.
Certified Values
Chloride ............................ 250 ± 7 mg/L Nitrate ................................ 48 ± 3 mg/L
Fluoride .......................... 1.5 ± 0.1 mg/L Sulfate ............................ 254 ± 10 mg/L
Indicative Value
Ammonium ........................... 0.48 mg/L
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