Table 3.

Method performance of L-phenylalanine quantitation by HPLC-CD.

Fixed concentration internal standard			Variable concentration internal standard
CL-phe [mg/g]	Bias [%]	RSD [%]	CL-phe [mg/g]	Bias [%]	RSD [%]
0.0106	−0.699	3.753	0.0530	−0.711	2.815
0.0320	−0.870	1.761	0.0842	−1.038	1.898
0.0842	−0.783	1.147	0.1056	−0.398	1.750
0.1056	0.703	0.727	0.3129	0.393	1.820
0.3129	−0.257	0.628	0.5195	0.651	0.9374
0.5195	0.242	0.803	0.8292	−0.010	1.170
0.8292	0.330	0.697	1.0370	−0.264	1.392
1.0370	0.084	0.650
1.0880	−0.856	0.844
1.1874	0.811	0.773
1.2799	0.792	1.327
1.4823	−0.489	1.225