2. _A. H. Allen_:
34.64 grams copper sulfate, solution made up to 500 cubic
centimeters; 180 grams potassium-sodium tartrate; 70 grams sodium
hydroxid (not less than 97° NaOH), solution made up to half a
liter.
Principles and practice of agricultural analysis. Volume 3 (of 3), Agricultural products · 第 31 / 164 题