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Acrylamide is formed when food is heated to high temperatures, e.g. when frying or deep-frying. The amino acid asparagine reacts with reducing sugars such as glucose or fructose (Figure 1). Cereal products (cereals, baked goods, etc.), potato products (chips, crisps) and coffee are particularly affected.
Animal experiments have shown that acrylamide is carcinogenic and damages the genome. It has therefore been categorised as "probably carcinogenic to humans". However, there are no binding limits for acrylamide in food (in the EU). Only guide values and minimisation measures were defined in 2013 and set out in a regulation at the end of 2017. The guideline values were lowered again. This guideline value is determined by the acrylamide value, which 90% of the samples fell below. There may therefore be further lower guideline values in the future. As a result, analysing acrylamide in food has also become essential.
Figure 1: Formation of acrylamide.
1. acrylamides 2. maleic acid 3. acrylic acid 4. acrylonitriles 5. itaconic acid 6. methacrylic acid
Column: Inertsil ODS-4 150x4.6mm, 3µm (5020-04045)
Mobile phase A: Acetonitrile
Mobile phase B: 0.1% phosphoric acid in water
Isocratic: A/B = 3/97, v/v
Flow rate: 1.0 mL/min
Column temperature: 40 °C
Detection: UV 210 nm
Injection volume: 10 µL
1. methyl acrylamides 2. acrylamides 3. methylarylic acid
Column: Nucleodur HILIC 125x4.0mm, 5 µm (760551.40)
Mobile phase: Acetonitrile / 0.1% formic acid (98:2, v/v)
Flow rate: 0.6 mL/min
Temperature: 22 °C
Injection volume: 0.5 µL
Detection: UV, 210 nm
1. acrylonitriles 2. propionamides 3. acrylamides
Column: InertCap Pure-WAX 30m x 0.25mm, 0.25 µm (1010-68142)
Column temperature: 40 °C (2min hold) - 20 °C/min - 150 °C (9.5min hold)
Carrier gas: Helium 100 kPa
Injection: Split flow 50 mL/min, 200 °C
Detection: FID range 10^0, 250 °C
Sample size: 100 mg/L in methanol, 1 µL
Based on these developments, many manufacturers have published applications for the determination of acrylamide. These range from reversed-phase chromatography, normal-phase chromatography and HILIC to gas chromatography.
HPLC - Reversed Phase:
GC:
HPLC - Reversed Phase:
HPLC - Normal Phase:
HPLC - Reversed Phase:
HPLC - HILIC:
UHPLC - Reversed Phase:
GC:
HPLC - Reversed Phase:
HPLC - Mixed Mode:
HPLC - Reversed Phase:
Sample preparation:
HPLC - Reversed Phase:
HPLC - Ion chromatography:
Gas chromatography:
Sample preparation:
HPLC _ Reversed Phase:
HPLC - HILIC:
HPLC - Reversed Phase:
UHPLC - Reversed Phase:
HPLC - HILIC:
UHPLC - HILIC:
Sample preparation
HPLC - Reversed Phase:
Sample preparation:
HPLC - Reversed Phase:
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