Measurement units

1 g = 1,000 (10^3) mg = 1,000,000 (10^6) ug = 1,000,000,000 (10^9) ng = 1,000,000,000,000 (10^12) pg
1 L = 1,000 (10^3) mL = 1,000,000 (10^6) uL = 1,000,000,000 (10^9) nL = 1,000,000,000,000 (10^12) pL

Molarity (M) concentration:
摩爾濃度 = 摩爾數/體積(升)
{(weight of comp'd, g)/(molecular weight of comp'd)}/volume of sol'n (L)
M1 x V1 = M2 x V2

Weight/volume (w/v) concentration:
重量體積濃度
Glucose (20%, w/v) –> 先秤重glucose 20 g後，加入ddH2O使其最終體積為100 mL

Q.S. (or q.s.)
用溶液將總體積填滿。q.s. with water to 1 L –> 加入水使之最終體積為1公升。