TY - JOUR
T1 - Optical sensing responses of CrIIICl(TPP)(H2O)-based coatings obtained by an atmospheric pressure plasma method - Application to the detection of volatile amines
AU - Boscher, Nicolas D.
AU - Bohn, Torsten
AU - Heier, Philip
AU - Moisy, Florent
AU - Untereiner, Boris
AU - Heinze, Katja
AU - Choquet, Patrick
PY - 2014
Y1 - 2014
N2 - Food spoilage processes are a considerable concern for both the food industry and the consumer, due to financial, food quality and food safety aspects. A primary issue is the prevention/monitoring of the formation of biogenic and volatile amines, such as occurring in fish and in other microbiologically unstable food items rich in proteins, produced by e.g. oxidative decarboxylation of amino acids. One strategy for their monitoring is the development of films with colorimetric sensing properties that are able to indicate food spoilage. The aim of this investigation was the development of a novel metalloporphyrin-based coating allowing the sensitive detection of typical volatile amines, such as trimethylamine (TMA), triethylamine (TEA) and dimethylamine (DMA), which were tested under static and dynamic flow conditions. Aqua(chloro)(5,10,15,20-tetraphenylporphyrinato)chromium(III) in solution at 0.75 mg mL-1 was deposited by means of an atmospheric pressure dielectric barrier discharge deposition method onto 50 μm thick transparent polyethylene terephthalate foils. Produced foils were able to detect volatile amines, as indicated via a hypsochromic shift of the Soret band of 5 nm and differential absorption at 442 nm, at 10 ppm, while detectable static concentrations were higher (ca. 150 ppm). Sensitivity was significantly higher for TMA, TEA and DMA than for NH3 (P < 0.001), and sufficient humidity was a prerequisite for sensitive detection. Results were confirmed by experiments with spoiled fish (mackerel, trout). Further investigations of metalloporphyrins that could act as selective food spoilage indicators amenable to naked-eye detection are warranted.
AB - Food spoilage processes are a considerable concern for both the food industry and the consumer, due to financial, food quality and food safety aspects. A primary issue is the prevention/monitoring of the formation of biogenic and volatile amines, such as occurring in fish and in other microbiologically unstable food items rich in proteins, produced by e.g. oxidative decarboxylation of amino acids. One strategy for their monitoring is the development of films with colorimetric sensing properties that are able to indicate food spoilage. The aim of this investigation was the development of a novel metalloporphyrin-based coating allowing the sensitive detection of typical volatile amines, such as trimethylamine (TMA), triethylamine (TEA) and dimethylamine (DMA), which were tested under static and dynamic flow conditions. Aqua(chloro)(5,10,15,20-tetraphenylporphyrinato)chromium(III) in solution at 0.75 mg mL-1 was deposited by means of an atmospheric pressure dielectric barrier discharge deposition method onto 50 μm thick transparent polyethylene terephthalate foils. Produced foils were able to detect volatile amines, as indicated via a hypsochromic shift of the Soret band of 5 nm and differential absorption at 442 nm, at 10 ppm, while detectable static concentrations were higher (ca. 150 ppm). Sensitivity was significantly higher for TMA, TEA and DMA than for NH3 (P < 0.001), and sufficient humidity was a prerequisite for sensitive detection. Results were confirmed by experiments with spoiled fish (mackerel, trout). Further investigations of metalloporphyrins that could act as selective food spoilage indicators amenable to naked-eye detection are warranted.
KW - Amine sensing
KW - Colorimetric detectors
KW - Food spoilage
KW - Metalloporphyrins
KW - Plasma-assisted chemical vapour deposition
UR - http://www.scopus.com/inward/record.url?scp=84887235194&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2013.10.044
DO - 10.1016/j.snb.2013.10.044
M3 - Article
AN - SCOPUS:84887235194
SN - 0925-4005
VL - 191
SP - 553
EP - 560
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -