 H2SO4 (10-per-cent) and determine the sulfur in the usual manner. Barium sulfate determined above is assumed to have been added as such . Obviously, if barium carbonate is present, it must be determined in order that an undue correction will not be made.  Crude Rubber and Compounding Ingredients - Page 317by Henry Clemens Pearson - 1918 - 420 pagesFull view - About this book
 | Analytical chemistry - 1927 - 1020 pages
...ammonium hydroxide, leaving it slightly acid. Saturate the solution with hydrogen sulphide in the cold, and when the lead sulphide has settled, filter into...beaker and wash thoroughly. The total volume should be not over 200 cc. Precipitate with 10 per cent sulphuric acid and determine the barium in the usual... | |
 | American Society for Testing Materials - Building materials - 1928 - 976 pages
...with NH<OH, leaving it slightly acid. Saturate the cold solution with H2S, and when the lead sulfide has settled, filter into a 400-cc. beaker and wash thoroughly. The total volume should be not over 200 cc. Precipitate with H2SO4 (10-per-cent) and determine the sulfur in the usual manner.... | |
 | Weights and measures - 1912 - 726 pages
...solution with hydrogen sulphide in the cold, and when the lead sulphide has settled filter into a 4oo-cc beaker and wash thoroughly. The total volume should...containing the filtrate, heat to boiling, and add 10 cc of hot 10 per cent sulphuric acid. Allow the precipitate to stand overnight. Filter off the barium sulphate... | |
 | American Society for Testing Materials - Building materials - 1928 - 1212 pages
...with NKUOH, leaving it slightly acid. Saturate the cold solution with HjS, and when the lead sulfide has settled, filter into a 400-cc. beaker and wash thoroughly. The total volume should be not over 200 cc. Precipitate with H8S04 (10-per-cent) and determine the sulfur in the usual manner.... | |
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