市售口香糖及糖果中二氧化鈦微粒之奈米性檢驗研究

Physical-chemical Characterization of Titanium Dioxide Particles in Commercial Chewing Gum and Candies Products

張詠聖(Yun-Shen Chang)；廖家鼎(Chia-Ding Liao)；曾素香(Su-Hsiang Tseng)；周秀冠(Hsiu-Kuan Chou)；陳惠芳(Hwei-Fang Cheng)

二氧化鈦 ； 奈米性 ； 粒徑 ； titanium dioxide ； physical-chemical characterization ； particle size

食品藥物研究年報

6期（2015 / 12 / 01）

36 - 45

繁體中文

本研究針對市售口香糖及糖果進行奈米性檢測方法之開發及市售產品調查。結果發現7件市售口香糖及2件市售糖果，平均粒徑介於183至325 nm之間，表面電荷則介於-5至-56 mV之間。表面積介於5.28至8.18 m^2/g之間。經由穿透式電子顯微鏡確認，9件市售產品中之TiO_2微粒以橢圓形及方形為主，有聚集的情形發生，其顆粒平均粒徑介於69至237 nm之間，而其元素組成皆以鈦為最主要元素。此外TiO_2聚集程度主要以2至5顆的TiO_2聚集顆粒為主，佔32.2%，聚集後的平均粒徑為417.7 ± 242.1nm。另，發現9件市售口香糖及糖果其粒徑不到歐盟所規範的奈米尺寸(1-100 nm)，但也達接近的「次微米」等級。

In this study, the physical-chemical characters of Titanium dioxide (TiO_2) in 9 commercial chewing gum and candies were investigated. The results showed that the average particle size of TiO_2 was from 183 to 325 nm, the surface area was from 5.28 to 8.18 m^2/g and the zeta potential was from -5 to -56 mV in 9 products signals were acquired by dynamic light scattering. Transmission electron microscope analysis showed that the shapes of TiO_2 in 9 products were mainly oval and square. Aggregated particles were found (mainly 2 to 5 units) and the amount of aggregated particles and their average size was 32.2% in average and 417.7 ± 242.1 nm, respectively. Energy dispersive spectrometer analysis indicated Titanium was the primary element of composition in particles.