supply of reference standard for ion chromatograph: merck make certified reference standard solutions traceable to srm from nist for ion chromatograph for following elements: 1.single element: - sodium standard solution traceable to srm from nist nano3 in hno3 0.5 mol/l, 1000 mg/ltr na certipur, make: merck, cat. no. 1.70238.0500. 2. multi element standard vii for cation chromatography (9 elements in hno3 0.001 mol/l) 100 mg/ltr: nh4, ba, ca, k, li, na., mg, mn, special repair certipur, make: merck, cat. no. 1.10322.0100 3. anion multi-element standard ii 1000 mg/ltr: chloride, nitrate and sulphate in h2o certipur, make: merck, cat. no. 1.11448.0500 note: certificate of analysis shall be provided with standard..
