Details

Autor(en) / Beteiligte

• Shimizu, Masao
• Weitkamp, Petra
• Vosmann, Klaus
• Matthäus, Bertrand

Titel

Influence of chloride and glycidyl-ester on the generation of 3-MCPD- and glycidyl-esters

Ist Teil von

• European journal of lipid science and technology, 2013-07, Vol.115 (7), p.735-739

Ort / Verlag

Weinheim: Blackwell Publishing Ltd

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Heating tests of pure diolein with various chloride and glycidyl ester (GE) levels at 240°C were conducted. Tetrabutylammonium chloride (TBAC) was used as a chloride source. The GE levels tended to converge on equilibrium around 100 mg‐as monochloropropane‐1,2‐diol (MCPD)/kg, regardless of the initial GE content, which suggested that the GE level was the result of competitive reactions between generation and decomposition. Chloride content had no influence on GE generation. On the other hand, 3‐MCPD ester levels were greatly influenced by both chloride and initial GE content, and the reactions were estimated to reach completion in the early stage of the heating period due to the run‐out of the chloride source. The conversion ratios of chloride to 3‐MCPD ester were 2–8%. These low ratios indicated that most of the TBAC was converted to inactive compounds for 3‐MCPD ester formation. Not only the quantity but also the type of chloride compound is important to control the 3‐MCPD ester level. Although generation of 3‐MCPD esters via GE was confirmed, practical impact was estimated to be small. However, this pathway should be taken into consideration, because GE is thought to make 3‐MCPD monoester, which could show different bioavailability compared with the diester that predominantly occurs in edible oils. Time course changes in 3‐MCPD esters from diolein test oils that initially contained zero (A), 60 mg/kg (B), or 120 mg/kg (C) of GE as an MCPD equivalent, during heating tests at 240°C without chloride (circle), or with 10 mg/kg (triangle), 30 mg/kg (square), and 50 mg/kg (diamond) of chloride. Data are described as the mean value of the differences in the duplicated experiments. Data under the limit of quantification (LOQ) were plotted on the LOQ (0.2 mg/kg). The levels of 3‐MCPD ester were strongly influenced by both chloride and initial GE content.