PN C04573-03-1988 Water and waste water Tests for organie solvents extractable matters Determination of total content of isopropyl ether or methylene chloride extractable organie matters by gravimetric method
1988PN C04573-03-1988 Water and waste water Tests for organie solvents extractable matters Determination of total content of isopropyl ether or methylene chloride extractable organie matters by gravimetric method