S.L. 437.76 чл. 3dried at g magnesium or the (3.3). Place to dissolve 1ꞏ000 mg

Reagents

3.1. Hydrochloric acid a.p. d: 1ꞏ16. 3.2. Concentrated hydrochloric acid a.p. d: 1ꞏ19. 3.3. Magnesium ribbon or wire, or magnesium sulphate heptahydrate, room temperature. 3.4. Strontium salt solution (chloride or nitrate) at 2ꞏ5 % (w/v) strontium

(= 76ꞏ08 g SrC12 ꞏ 6H2O a.p., or 60ꞏ38 g Sr (NO3)2 a.p.). 3.5. Standard magnesium solution: weigh out to the nearest mg 1 (3.3) which has previously had its oxide coating carefully removed, corresponding quantity (10ꞏ143 g) of magnesium sulphate heptahydrate ina 1 000 ml graduated flask, add 80 ml hydrochloric acid (3.1), leave and make up to 1 000 ml with water. 1 ml of this solution contains magnesium.