Removal of Hardness of Earth Alkaline Metals from Aqueous Solutions by Ion Exchange Method

Table 2

Instrumental parameters for determination of calcium and magnesium [29].

Instrumental parameters	Calcium	Magnesium
Wave length (nm)	442,67	442,67
Slit width (nm)	2,7	2,7
Fuel	Acetylene/air	Acetylene/air
Lamp current (mA)	20	20
Optimum working range	(0.5–2.5) mg/L	(0.2–1.0) mg/L