ISO 1138:1981 Rubber compounding ingredients - Carbon black - Determination of sulphur content standard by International Organization for Standardization, 12/01/1981
ISO 7130:1981 Earth-moving machinery -- Guide to procedure for operator training standard by International Organization for Standardization, 12/01/1981
ISO 3952-1:1981 Kinematic diagrams - Graphical symbols - Part 1 standard by International Organization for Standardization, 12/01/1981
ISO 1388-9:1981 Ethanol for industrial use -- Methods of test -- Part 9 : Determination of esters content -- Titrimetric method after saponification standard by International Organization for Standardization, 12/01/1981
ISO 1388-4:1981 Ethanol for industrial use -- Methods of test -- Part 4 : Estimation of content of carbonyl compounds present in moderate amounts -- Titrimetric method standard by International Organization for Standardization, 12/01/1981
ISO 1388-3:1981 Ethanol for industrial use -- Methods of test -- Part 3 : Estimation of content of carbonyl compounds present in small amounts -- Photometric method standard by International Organization for Standardization, 12/01/1981
ISO 1388-5:1981 Ethanol for industrial use -- Methods of test -- Part 5 : Determination of aldehydes content -- Visual colorimetric method standard by International Organization for Standardization, 12/01/1981
ISO 1388-12:1981 Ethanol for industrial use -- Methods of test -- Part 12 : Determination of permanganate time standard by International Organization for Standardization, 12/01/1981
ISO 1388-11:1981 Ethanol for industrial use -- Methods of test -- Part 11 : Test for detection of furfural standard by International Organization for Standardization, 12/01/1981
ISO 619:1981 Manganese ores -- Determination of chromium content -- Diphenylcarbazide photometric method and silver persulphate titrimetric method standard by International Organization for Standardization, 12/01/1981
ISO 5377:1981 Starch hydrolysis products -- Determination of reducing power and dextrose equivalent -- Lane and Eynon constant titre method standard by International Organization for Standardization, 12/01/1981
ISO 5351-1:1981 [ Withdrawn ] Cellulose in dilute solutions; Determination of limiting viscosity number; Part 1 : Method in cupri-ethylene-diamine (CED) solution standard by International Organization for Standardization, 12/01/1981