Table 4.

Mass spectrometric signal intensities of 28 compounds in quality control (QC) samples across the analytical batch.

No.	Compound Name	HRMS signal intensity									Calculated value
		QC 1	QC 2	QC 3	QC 4	QC 5	QC 6	QC 7	QC 8	QC 9	Average	SD	CV%
1	2-Chloro-L-phenylalanine	9529581	9088904	9485429	8742235	9469332	9395555	9548525	8850665	8704423	9,201,628	355,641	3.9%
2	Phenylacetylglutamine	382822	383624	392065	384992	387027	384947	373850	393136	341656	380,458	15,589	4.1%
3	Indole-3-acetic acid	124032	119284	121262	120338	114885	122387	107521	115021	118044	118,086	5,021	4.3%
4	Hexanoylcarnitine	58657	60892	58681	54927	57700	55457	54468	52743	56352	56,653	2,543	4.5%
5	Bilirubin	406307	399800	418485	422007	452406	407273	422593	383009	399875	412,417	19,611	4.8%
6	Ornithine	298137	292367	312863	298005	286066	294694	333486	295200	315194	302,890	14,805	4.9%
7	Methyl indole-3-acetate	226667	226120	228808	211032	224630	215322	215505	197252	199534	216,097	11,740	5.4%
8	Indole-3-lactic acid	39725	40016	38566	37977	34284	39277	35479	37280	35526	37,570	2,066	5.5%
9	Decanoylcarnitine	332006	330514	312064	327887	363043	342753	352238	303945	309703	330,461	19,901	6.0%
10	Uracil	34652	38553	34294	38542	33435	37115	33404	38183	37381	36,173	2,199	6.1%
11	L-Arginine	227217	200801	213641	226435	234702	207762	248974	233852	227311	224,522	14,871	6.6%
12	Palmitoylcarnitine	162114	139816	153831	152894	151122	149560	151737	158446	128209	149,748	10,146	6.8%
13	Cortisol	46274	42796	42073	37517	40200	45271	41367	41043	38296	41,649	2,891	6.9%
14	Uric acid	1467068	1499030	1419389	1601035	1732179	1657507	1486082	1505374	1406219	1,530,431	110,221	7.2%
15	Creatinine	866914	768723	865649	884379	862536	876028	894620	948036	1007037	885,991	64,959	7.3%
16	Sphingosine 1-phosphate	262005	266871	262232	240920	252065	242596	248322	230150	207334	245,833	18,644	7.6%
17	Acetyl-L-carnitine	2827805	2551314	2853465	2304034	2525169	2693666	2380845	2599126	2319824	2,561,694	204,268	8.0%
18	5-Oxoproline	293296	320502	273675	304564	321100	360339	338945	350682	314297	319,711	27,519	8.6%
19	Creatine	624589	755177	749724	796530	718671	748896	850668	752585	845281	760,236	6,8172	9.0%
20	Choline	1237398	1109407	1409400	1374631	1411754	1559393	1309037	1272301	1384232	1,340,839	127,715	9.5%
21	Hypoxanthine	108960	94697	93750	104105	122321	122007	110056	108137	117448	109,053	10,494	9.6%
22	Acetylcholine	111943	106859	124111	104598	88129	86441	95092	109266	124226	105,629	13,823	13.1%
23	L-Histidine	183886	196229	236228	288127	257609	260952	214771	274265	297919	245,554	40,360	16.4%
24	Proline	2299600	1450474	2030671	1514785	2035300	2526576	2160492	2444573	2252567	2,079,449	376,999	18.1%
25	Propionylcarnitine	113886	123703	94571	103424	105471	86245	65572	76310	75260	93,827	19,463	20.7%
26	Betaine	93875	137794	131380	114206	88957	114522	79435	128731	74935	107,093	23,476	21.9%
27	Pipecolic acid	274335	664566	749064	714482	704826	731427	705162	669263	700309	657,048	145,963	22.2%
28	Arachidonic acid	112458	120743	139285	116542	97998	101572	66210	93987	70134	102,103	23,556	23.1%