| 单词 | calcium superphosphate |
| 释义 | > as lemmascalcium superphosphate 1. Chemistry. A phosphate containing an excess of phosphoric acid; an acid phosphate. Now disused except in superphosphate of lime, calcium superphosphate: cf. sense 2. ΘΚΠ the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > phosphates or phosphites > specific named microcosmic salt1770 superphosphate1798 oxyphosphate1815 hypophosphite1818 thorina1818 tri-phosphate1823 bone phosphate1834 phosphate1849 triple phosphate1857 hypophosphate1864 trimethyl-phosphine1866 hexametaphosphate1891 trimetaphosphate1894 triose phosphate1934 1798 Philos. Trans. (Royal Soc.) 88 17 It was..Scheele who discovered, that the urine of healthy persons contains superphosphate, or acidulous phosphate, of lime. 1811 A. T. Thomson London Dispensatory iii. 468 By the strong acids it [sc. phosphate of soda] is converted into superphosphate of soda. 1843 W. Hay in Farmer's Mag. Jan. 42/2 By the action of sulphuric acid on bones a superphosphate of lime is produced. 1876 J. Harley Royle's Man. Materia Med. (ed. 6) 62 When the superphosphate is heated with charcoal, tribasic phosphate is re-formed, and phosphoric acid set free. 1920 H. N. McCoy & E. M. Terry Introd. Gen. Chem. (ed. 2) 96 In order to make it available it is treated with sufficient sulfuric acid to convert it into Ca(H2PO4)2, usually known as calcium superphosphate, which is soluble in water. 1941 G. E. Whitehead Plain Veg. Growing ii. 41 Some [onion growers] mix together 3 lb. superphosphate of lime and 1½ lb. nitrate of soda and scatter it over 30¼ square yards of ground about a fortnight before sowing seed. 2005 T. V. R. Pillay & M. N. Kutty Aquaculture 132 Media containing 300mg/l ammonium sulphate and 50mg/l calcium superphosphate have also been used successfully. < as lemmas |
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