Spectrophotometer parameters (Varian AAS 240 FS, USA) | |
Wavelength | 193.7 |
Exit slit | 0.7 nm |
Ultra-lamp intensity | 10 mA |
Signal measurement mode | pic high |
Linearity | 2.5 - 15.0 ppb (r2 = 0.99) |
Precision (n = 3) | 5.6% |
LOQ | 2.5 ppb |
LOD | 0.5 ppb |
NaBH4 concentration | 0.6 % (m/v) stabilised with NaOH (0.5%) |
NaBH4 flow rate | 4 - 6 mL/min |
HCl concentration | 5 M |
HCl flow rate | 9 - 11 mL/min |
Argon flow rate | 40 - 60 mL/min |