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- [23] SIMULTANEOUS DETERMINATION OF METALS IN LUBRICATING OILS ERDOL & KOHLE ERDGAS PETROCHEMIE, 1978, 31 (04): : 200 - 204
- [24] SPECTROPHOTOMETRIC DETERMINATION OF PHOSPHORUS IN LUBRICATING OILS ANALES DE QUIMICA SERIE B-QUIMICA INORGANICA Y QUIMICA ANALYTICA, 1980, 76 (01): : 149 - 153
- [25] DETERMINATION OF ADDITIVES IN ENGINE LUBRICATING OILS MAGYAR KEMIKUSOK LAPJA, 1967, 22 (03): : 160 - +
- [26] Voltammetric Determination of Zinc in Lubricating Oils ENERGY & FUELS, 2009, 23 (5-6) : 3048 - 3053
- [27] DETERMINATION OF SODIUM IN USED LUBRICATING OILS ANALYTICAL CHEMISTRY, 1954, 26 (11) : 1851 - 1851
- [28] IMPROVEMENT OF WICKBOLD COMBUSTION APPARATUS FOR DECOMPOSITION OF PETROLEUM-PRODUCTS AND USED LUBRICATING OILS FOR TRACE ANALYSIS OF INORGANIC COMPONENTS FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1977, 288 (04): : 273 - 276
- [30] DETERMINATION OF ZINC IN LUBRICATING OILS AND LUBRICATING OIL CONCENTRATES - A MICRO-COLORIMETRIC METHOD EMPLOYING ZINCON ZEITSCHRIFT FUR ANALYTISCHE CHEMIE FRESENIUS, 1968, 239 (01): : 33 - &