pH = 4.00 (25℃) 500ml
pH = 4.01 ± 0.02(25℃) 500ml
pH = 4.012(25℃) 500ml
pH=4.5±0.02(25℃) 500ml
PH=5.00±0.02(25℃) 500ml
pH = 5.4 ± 0.02(25℃) 500ml
pH = 7.4± 0.02(25℃) 500ml
pH = 6.86 ±0.02(25℃) 500ml
pH = 6.863(25℃) 500ml
pH = 7.00 (25℃) 500ml