β-胡萝卜素有很高的药理学及营养学价值，探究它在瓜果蔬菜中的分布是一个有趣且重要的科学问题。本文利用拉曼光谱成像技术检测胡萝卜和南瓜中β-胡萝卜素的含量分布，发现胡萝卜素皮层β-胡萝卜素的特征拉曼峰强度较根芯处高；南瓜表皮层β-胡萝卜素的特征拉曼峰强度也较果肉处高. 这个结果深化了果蔬皮下更具营养的朴素观念，也展示了一种确定β-胡萝卜素在果蔬中含量分布的实验方法.

Carrots and Pumpkin contain a large number of β-carotene, have a high pharmacological and nutritional value. Because β-carotene contains a large number of delocalized electrons and has photoelectric characteristics, a laser with excitation wavelength of 532 nm can produce resonance Raman effect in the absorption spectrum of β-carotene in Raman scattering. The Raman spectra of carrot and Pumpkin are measured and the image of Raman is made. It is found that the intensity of characteristic Raman peaks of β-carotene in carrot epidermis is higher than that in root core, the intensity of characteristic Raman peaks in the β-carotene of Pumpkin skin is also higher than that in the pulp. This study provides a new method to measure the content of β-carotene by using Raman mapping technique.