absolute detection limit的用法和样例：
- A capillary column with wide-diameter was used to separate DMF. The detection limit could reach 0. 001mg/m~3 (the absolute value was 10~(-3)ng).
- The detection limit for AA/AM/4-MNDMAPN-AQ is 0.5 mg. L~(-1).
- The detection limit for surface waters is 0.05 ppb U .
- Detection limit of the method for octane was 10 ppt.