 | Chemical industry - 1919 - 344 pages
...Reagents.— Sodium plumbite or "doctor solution." Dissolve approximately 125 grams of sodium hydroxide (NaOH) In a liter of distilled water. Add 60 to 70 grams...asbestos may be employed If the solution does not settle clear. The solution should be kept in a bottle tightly stoppered with a cork. Sulfur: — Obtain... | |
 | Roy Cross - Asphalt - 1919 - 508 pages
...(NaOH) in a liter of distilled water. Add 70 grams of litharge (PbO) and shake vigorously for 15 or 30 minutes or let stand with occasional shaking for at least a day. Allow to settle and decant off the clear liquid. Filtration through a mat of asbestos may be employed if the solution does not... | |
 | Luther Bynum Lockhart - Lubrication and lubricants - 1920 - 378 pages
...negative doctor test. DIRECTIONS FOR MAKING DOCTOR TEST. (A) Preparation of reagents. — Sodium plumbate or "doctor solution :" Dissolve approximately 125...asbestos may be employed if the solution does not settle clear. The solution should be kept in a bottle tightly stoppered with a cork. Sulphur : Obtain... | |
 | John Rome Battle - Lubrication and lubricants - 1920 - 1280 pages
...Sodium plumbite or " doctor solution ": Dissolve approximately 125 grams of sodium hydroxide (NaOH) in a liter of distilled water. Add 60 to 70 grams...settle and decant or siphon off the clear liquid. If the solution does not settle clear it may be filtered through an asbestos mat. The solution should... | |
 | lieut. albert tucker, (cc) - 1921 - 478 pages
...reagents—Sodium plumbite or "doctor solution." Dissolve approximately 125 grams of sodium hydroxide (NaOH) in a liter of distilled water. Add 60 to 70 grams...asbestos may be employed if the solution does not settle clear. The solution should be kept in a bottle tightly stoppered with a cork. 2. Sulphur. Pure... | |
 | Robert Mason Wilhelm - Oil inspection - 1923 - 120 pages
...(NaOH) in 1 liter of distilled water. Add 60 grains of litharge (PbO) and shake vigorously for 1 5 minutes or let stand with occasional shaking for at...asbestos may be employed if the solution does not settle clear. The solution should be kept in a tightly corked bottle and should be refiltered before... | |
 | Eugene Hendricks Leslie - Fuel - 1923 - 700 pages
...sodium hydroxide in a liter of distilled water. Add 60 grams of litharge and shake vigorously for 15 minutes, or let stand with occasional shaking for...asbestos may be employed if the solution does not settle clear. The solution should be kept in a tightly corked bottle and should be refiltered before... | |
 | Eugene Hendricks Leslie - Fuel - 1923 - 698 pages
...sodium hydroxide in a liter of distilled water. Add 60 grams of litharge and shake vigorously for 15 minutes, or let stand with occasional shaking for...clear liquid. Filtration through a mat of asbestos ma> be employed if the solution does not settle clear. The solution should be kept in a tightly corked... | |
 | George G. Oberfell, R. C. Alden - Gasoline - 1924 - 568 pages
...(NaOH) in 1 liter of distilled water. Add 60 grams of litharge (PbO) and shake vigorously for 15 min. or let stand with occasional shaking for at least...asbestos may be employed if the solution does not settle clear. The solution should be kept in a tightly corked bottle and should be refiltered before... | |
 | William J. Foster - Airplanes - 1925 - 780 pages
...Sodium plumbite or "doctor solution." — Dissolve approximately 125 grams of sodium hydroxide (NaOH) in a liter of distilled water. Add 60 to 70 grams...asbestos may be employed if the solution does not settle clear. The solution should be kept in a bottle tightly stoppered with a cork. Sulphur. — Pure... | |
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Sodium plumbite (doctor solution) .—Dissolve approximately 125 g of sodium hydroxide (NaOH) in 1 liter of distilled water. Add 60 g of litharge (PbO) and shake vigorously for 15 minutes or let stand with occasional shaking for at least a day. Allow... 
