Simultaneous Determination of 32 Pyrrolizidine Alkaloids in Two Traditional Chinese Medicine Preparations by UPLC-MS/MS

Table 2

Standard curve, linear range, and R for PAs in the XYT.

Compound^1	Standard curve line	Linear range (μg/mL)	r ^2	Compound	Standard curve line	Linear range (μg/mL)	r
Em	y = 103074x + 11930.1	0.7852 – 39.26	0.999	7-Ly	y = 15161.2x + 2419.04	0.84 – 42	0.999
Er	y = 23539.7x + 36563.2	2.065 – 103.25	0.999	7-Im	y = 34526.6x − 785.171	0.8196 – 40.98	0.999
Eu	y = 137290x + 16650.4	0.8096 – 40.48	0.995	EmNO	y = 3897.03x + 1680.78	4.136 – 206.8	0.999
He	y = 117780x + 22207.8	0.8176 – 40.88	0.999	ErNO	y = 29337.1x + 11196.1	2.017 – 100.85	0.994
Ic	y = 91690.0x + 15739.7	0.7916 – 39.58	0.998	EuNO	y = 4361.23x + 1906.23	1.984 – 99.2	0.998
Im	y = 45160.1x + 5115.68	0.8256 – 41.28	0.999	HeNO	y = 84714.4x + 14931.2	2.054 – 102.7	0.998
Jb	y = 18459.2x + 371.455	2.027 – 101.35	0.998	IcNO	y = 18459.2x + 371.455	0.7916 – 39.58	0.998
Lc	y = 213437x + 17634.3	0.8076 – 40.38	0.994	ImNO	y = 5658.26x + 23.7988	0.848 – 42.4	0.995
Ly	y = 42618.1x + 34005.6	0.8236 – 41.18	0.998	JbNO	y = 23061.7x − 7354.04	1.995 – 99.75	0.998
Mc	y = 37794.5x + 18435.9	2.06 – 103	0.997	LcNO	y = 15720.3x + 6353.57	0.7872 – 39.36	0.996
Re	y = 11762.0x + 336.356	4.06 – 203	0.999	LyNO	y = 11762.0x + 336.356	1.934 – 96.7	0.999
Sk	y = 2559.25x + 4467.82	2.009 – 100.45	0.994	McNO	y = 17940.2x − 3716.42	2.062 – 103.1	0.999
Sn	y = 24934.7x − 1030.49	3.908 – 195.4	0.999	ReNO	y = 12647.5x − 8885.25	8.196 – 204.9	0.996
Sp	y = 16347.7x + 4728.13	2.024 – 101.2	0.997	SnNO	y = 29089.1x + 2805.59	4.046 – 202.3	0.999
Sv	y = 20077.5x − 2234.22	4.06 – 203	0.999	SpNO	y = 28269.4x − 4078.85	1.947 – 97.35	0.998
Td	y = 43131.0x + 1767.45	1.976 – 98.8	0.999	SvNO	y = 33290.3x + 13311.5	4.042 – 202.1	0.999

¹ For the abbreviations of the compounds, see 2.1 Standards. ² Correlation coefficient.