Determination of Morphine in Human Urine by the Novel Competitive Fluorescence Immunoassay

Table 2

Standard addition results of MOR in urine samples ().

Detection method	Drug added (µg/ml)	Detectable concentration of MOR	Recovery (%)	RSD (%)
Competitive fluorescence immunoassay	0.5	0.54893	109.79	1.0301
	1.5	1.5964	106.43	1.6171
	2.5	2.4971	99.884	3.4278
GC-MS/MS	0.1	0.10118	101.18	19.380
	12.5	11.075	88.600	8.0400
	50	38.770	77.540	6.2800