Reference

Determination of zinc dialkyl dithiophosphate additives in lubricating oil by photometric titration

Determination of zinc dialkyl dithiophosphate additives in lubricating oil by photometric titration. Plaza, Stanislaw (Dep. Chem. Technol. Environ. Prot., Univ. Lodz, Lodz, Pol.). Analyst (London), 109(10), 1313-15 (English) 1984. CODEN: ANALAO. ISSN: 0003-2654. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 80 A photometric titrn., using 4-Me2NC6H4HgOAc [23332-31-2] with Michler's thioketone [1226-46-6] as indicator, is described for the detn. of zinc dialkyl dithiophosphates in lubricating oils. The method is simple, rapid, reproducible, and accurate, and samples do not require sepn. or other preliminary stages prior to anal. The method is suitable for detg. additives in oils at concns. >0.01%.

Comparison of photometric methods for determination of silver in drinking water

Comparison of photometric methods for determination of silver in drinking water. Pilipenko, A. T.; Matsibura, G. S.; Terletskaya, A. V. (Inst. Kolloidn. Khim. Khim. Vody im. Dumanskogo, Kiev, USSR). Khim. Tekhnol. Vody, 8(5), 46-9 (Russian) 1986. CODEN: KTVODL. ISSN: 0204-3556. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 79 Photometric methods for detn. of Ag in drinking waters using (1) p-(dimethylamino)benzylidenerhodanine [536-17-4],(2) dithizone (I) [60-10-6], (3) o-phenanthroline [66-71-7] and bromopyrogallol red [16574-43-9], and (4) Michler's thioketone [1226-46-6] are described and compared. The use of methods 2 and 4 is recommended for Ag concns. ~0.005 mg/L. A new method for the detn of Ag with the use of I in the presence of sodium dodecylsulfate is also described.