For best results dilute the stock single-element calcium standard
solution 1.000 gram per litter (CPA No C009100) to
levels appropriate to the operating range of the instrument using. The working
solution must be freshly prepared.
A calibration blank is used to establish the analytical calibration
curve; the laboratory blank is used to assess possible contamination from the
sample preparation procedure and to assess spectral background.
Calibration blank—Consists of 1% (v/v) nitric acid in high-purity
analytical water.
q
Recomended Parameters
(Varian instruments)
Lamp Current 10
mA
Spectral Bandwidth 0.5 nm
Wavelenght 422.7
nm
Maximum Ash Temp. 1200 oC (Nitric acid medium)
Typical response (Argon): 5 μl of 10 ppb Ca
solution gives about 0.3 Abs.
For complex samples and/or matrixes Thorium-Magnesium
modifier (CPA No MD007) is recommended. Maximum Ash Temperature 1500oC
with chemical modifier. Use this solution for
addition to blanks, calibration standards and samples.