Extraction-fluorimetric determination of codeine in human urine

The fluorimetric determination of riboflavin in urine.

Extraction and Determination of Cyproheptadine in Human Urine by DLLME-HPLC Method

Novel dispersive liquid-liquid microextraction (DLLME), coupled with high performance liquid chromatography with photodiode array detection (HPLC-DAD) has been applied for the extraction and determination of cyproheptadine (CPH), an antihistamine, in human urine samples. In this method, 0.6 mL of acetonitrile (disperser solvent) containing 30 µL of carbon tetrachloride (extraction solvent) was ...

Extraction and Determination of Cyproheptadine in Human Urine by DLLME-HPLC Method

Novel dispersive liquid-liquid microextraction (DLLME), coupled with high performance liquid chromatography with photodiode array detection (HPLC-DAD) has been applied for the extraction and determination of cyproheptadine (CPH), an antihistamine, in human urine samples. In this method, 0.6 mL of acetonitrile (disperser solvent) containing 30 µL of carbon tetrachloride (extraction solvent) was ...

Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry

A sensitive and selective gas chromatography-mass spectrometry (GC-MS) method was developed and validated for the determination of morphine and codeine in human urine. The GC-MS conditions were developed. The analysis was carried out on a HP-1MS column (30 m × 0.25 mm, 0.25  μ m) with temperature programming, and Helium was used as the carrier gas with a flow rate of 1.0 mL/min. Selected ion mo...

Fluorimetric determination of creatine.

STRONGLY ALKALINE SOLUTIONS ninhydrin (1,2,3 indantrione hy) combines with guanidine, monosubstituted guanidines, and disubstituted guanidines to form highly fluorescent addition ucts (1). This reaction has been used as the basis for a simple, itive fluorimetric method for the determination of creatine in m, blood, and urine. he most widely used methods for determining creatine are based n the ...