原文由 luyeaa 发表:
原话是
Tetraethylammonium Bromide, internal standard solution—Into a 100-mL volumetric flask weigh approximately 10.80 g of Tetraethylammonium bromide (TEAB) to 1 mg
原文由 poorlittle 发表:原文由 luyeaa 发表:
原话是
Tetraethylammonium Bromide, internal standard solution—Into a 100-mL volumetric flask weigh approximately 10.80 g of Tetraethylammonium bromide (TEAB) to 1 mg
This means that since it is approximately 10.80 g, 10.804, 10.803, 10.802……10.799,…… 10.795 g are all acceptable, but the measurement of the sample weight should be accurate to 0.001 g (i.e. 1 mg).
Taking the sample of exactly 10.800 g is not necesarry.