เคมี

รายการของเนื้อหาในหมวดหมู่ chemical
หัวเรื่อง	ฮิต
BS 5551-4.1.4:1984 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide (titrimetric method)	ฮิต: 224
BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)	ฮิต: 220
BS 5551-4.1.2:1982 Fertilizers. Chemical analysis. Determination of nitrogen. Determination of ammoniacal nitrogen, titrimetric method after distillation	ฮิต: 137
BS 553:1990 Specification for ethyl acetate for industrial use.	ฮิต: 272
BS 551:1990 Specification for butyl acetate for industrial use.	ฮิต: 239
BS 549:1970 Specification for diacetone alcohol.	ฮิต: 212
BS 5443:1977 Recommendations for a standard layout for methods of chemical analysis by gas chromatography.	ฮิต: 305
BS 508-2:1984 Butan-1-ol for industrial use. Methods of test	ฮิต: 265
BS 508-1:1986 Butan-1-ol for industrial use. Specification for butan-1-ol	ฮิต: 199
BS 5050:1974 Methods of test for cryolite.	ฮิต: 254