Mass rGO/CuO catalyst	= 0.1 g
vol. Injection	= 1 µL = 10−3 mL
Normalization CH3OH	= 0.3 vol % (resulted from GC–MS)
$\mathsf{\rho }$ CH3OH	= 0.792 g/cm3
Mr CH3OH	= 32
vol. CH3OH	= Normalization CH3OH × vol. Injection
	= 3% × 1 µL = 0.003 µL = 0.003 × 10−3 cm3
Mass CH3OH	= $\mathsf{\rho }$ CH3OH × vol. CH3OH
	= 0.792 g/cm3 × 0.003 × 10−3 cm3
	= 2.376 × 10−6 g
n CH3OH in solution	= Mass CH3OH/Mr CH3OH
	= 2.376 × 10−6 g/32
	= 7.425 × 10−8 mol = 0.07425 µmol
vol. Solution	= 50 mL
n CH3OH in injector	= (n CH3OH in solution × vol. solution)/vol. Injection
	= 0.07425 µmol × 50 mL/10−3 mL
	= 3712.5 µmol
n CH3OH/g catalyst	= n CH3OH in injector/Mass rGO/CuO catalyst
	= 3712.5 µmol/0.1 g
	= 37125 µmol/g = 37.125 mmol/g