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Citation:
FAN Li, LI Dan, SUN Yang, HU Qian-Qian. Determination of Octreotide by Resonance Rayleigh Scattering Method with Methyl Red[J]. Chinese Journal of Applied Chemistry,
;2010, 27(5): 585-589.
doi:
10.3724/SP.J.1095.2010.90413
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An ultrasensitive resonance rayleigh scattering(RRS) method for the determination of trace octreotide was developed.The determination of octreotide in an octreotide-methyl red system via RRS was studied comprehensively.In a pH=3.78 B-R buffer solution,the RRS intensity is enhanced obviously in the range of 280~370 nm as octreotide associates with methyl red.The strongest △IRRS is at 310 nm.The RRS intensitiy of octreotide is proportional to the concentration of octreotide over the range of 0~0.54 mg/L,the detection limit for the octreotide(3σ) is 3.6 μg/L under optimum conditions.The method was applied to the determination of octreotide in synthetic samples with the recovery of 98.3%~100.7%.Measurements of the commercial injection samples also gave satisfactory results which were in good agreement with those obtained using high performance liquid chromatography(HPLC) method.
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Keywords:
- resonance rayleigh scattering,
- octreotide,
- methyl red
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