Saeco Talea Ring - Blended Gypsum - Major Oxides and Trace Elements

Version 10.0 – July 2014
49
Code
Batch
Description Unit Size
LGC2702
1
Blended
Gypsum
–
Major Oxides and Trace Elements
Blended gypsum, in the form of chippings and powders, was obtained from British
Gypsum (East Leake, Leicestershire, UK). The material was dried at 30 °C in a
calibrated drying oven, then ball-milled in a cleaned 250 mL capacity agate milling
vessel until the powder passed a calibrated 75 µm stainless steel sieve mesh.
This reference material is intended for use in the validation of new methods, and for
monitoring the performance of methods commonly used in laboratories to analyse
samples of gypsum for quality control and environmental monitoring purposes.
Certified Value
Mercury ...................................... 420 ± 35 µg/kg
Assessed Values
Aluminium (as Al
2
O
3
) ....... 1.121 ± 0.038 g/100 g Silicon (as SiO
2
) .............. 3.01 ± 0.12 g/100 g
Calcium (as CaO) .............. 31.47 ± 0.65 g/100 g Sulfur (as SO
3
) .............. 41.26 ± 0.69 g/100 g
Iron (as Fe
2
O
3
)................. 0.392 ± 0.036 g/100 g Titanium (as TiO
2
) ... 0.0550 ± 0.0049 g/100 g
Phosphorus (as P
2
O
5
) .. 0.0177 ± 0.0079 g/100 g Loss on Ignition ............. 21.32 ± 0.21 g/100 g
Potassium (as K
2
O) ......... 0.196 ± 0.013 g/100 g
Lead .......................................... 8.4 ± 2.1 mg/kg Vanadium ............................. 10.5 ±1.5 mg/kg
Nickel ........................................ 4.8 ± 1.4 mg/kg Zinc ..................................... 11.7 ± 3.1 mg/kg
Indicative Values
Magnesium (as MgO) ..................... 0.92 g/100g Sodium (as Na
2
O) ..................... 0.031 g/100g
Maganese (as MnO) ..................... 0.011 g/100g Strontium (as SrO) ...................... 0.13 g/100g
Arsenic .............................................. 2.4 mg/kg Copper ........................................... 4.4 mg/kg
Barium ................................................ 43 mg/kg Selenium ........................................ 5.1 mg/kg
Chromium .......................................... 9.0 mg/kg Thallium ....................................... 0.18 mg/kg
Cobalt ................................................ 1.8 mg/kg
75
g
4005