Table 2.

Intermediate precision: mean concentration measured on different days by two analysts.

Amino acid content level	Mean concentration			Intermediate %RSD	Average %RSD
	Day 1	Day 2	Day 3
Low (30 µg/ml)	31.68	27.61	33.18	3.30	1.55
Medium (60 µg/ml)	67.27	59.29	57.89	0.99
High (105 µg/ml)	105.32	102.69	106.34	0.37

RSD—Relative standard deviation. All samples were run in quadruplicate.