1. Fed. Reg., 56, No. 20, January 30 (1991) 3256.
2. Method 515.1 Determination of chlorinated acids in water by gas chromatography with an electron capture detector,1988
3. Method 8151A. Chlorinated herbicides by GC using methylation or pentafluorobenzylation derivatization: capillary column technique,1995
4. Method 515. Determination of chlorinated acids in water using liquid-solid extraction and gas chromatography with an electron capture detector,1992
5. Determination of acid herbicides in aqueous samples by liquid—solid disk extraction and capillary gas chromatography