Crystallization yielded white crystals containing pure
arginine (Table 2). The exact mass of this pellet was 175.1190
(M+), identical to the theoretical mass expected for pure arginine.
While crystallization would be the method of choice to produce
arginine of the highest purity, precipitation might be preferred
when a higher yield is required. Thus, although the precipitated
preparation is only 90.7% arginine, the yield of precipitation is
38% vs. 22% for crystallizatio