Review Article

Naturally Occurring Plant Food Toxicants and the Role of Food Processing Methods in Their Detoxification

Table 1

Summary of some novel food processing techniques effective in detoxifying inherent plant food toxicants.

ToxinsMatrixProcessing methodProcessing conditionResultReference

Cyanogenic glycoside and hydrogen cyanideCassava juiceUltrasonic treatmentUPT (45°C, 81 W) for 10 minCyanogenic glycoside-24.95%
Hydrogen cyanide-40.36% in cassava juice
Zhong et al. [153]
Plum kernelMicrowave heating and hydrothermal treatmentMicrowave heating (450 W for 6 min) combined with hydrothermal treatment (12 h at 45°C)Microwave heating reduced 98.02% of the cyanogenic glycoside content of the plum kernelSheikh et al. [23]
FlaxseedsMicrowave heatingFrequency- 2,450 MHz
Power output- 450 W for 12 min
70.9% HCN removalSafdar et al. [154]
SonicationPower- 300 W and 20 kHz frequency in a pulsed mode (10 s on and 3 s off) at 50°C for 20 min92.1% HCN removalSafdar et al. [154]
AutoclavingAutoclaving at 120°C for 20 min62.6% HCN removalSafdar et al. [154]
Solvent extractionMethanol: ammonia: water; in 95 : 5 : 5 at 500 rpm for 15 min82.4% HCN removalSafdar et al. [154]

GlycoalkaloidsPotatoHigh-pressure processing (HPP) and ultrasound treatment (US)HPP treatment-600 MPa
Duration- 3 min at 10.6°C
Reduced 95% glycoalkaloid content of rooster potatoesTsikrika et al. [155]

GlucosinolatesRapeseed mealSteam explosionSteam pressure- 1.6 MPa
Duration- 180 s
99% of glucosinolates removedGu et al. [156]
Broccoli sproutsHigh-pressure processing (HPP)Pressure- 600 MPa for 3 min85% of glucosinolates converted into health-benefiting isothiocyanatesWestphal et al. [24]
BroccoliMicrowavingPower- 1000 W
Duration- 10 min
64.6% glucosinolate content reduced after microwavingHwang & Kim [106]
Indian mustardMicrowave treatmentFrequency of 2450 MHz, power- 900 W
Duration- 6 min
Glucosinolates level reduced from 20.46 μM g-1 to 3.57 μM g-1Verma et al. [157]

LectinsSebastiania jacobinensis barkGamma irradiationRadiation dose- 1 kGy
Duration-1 hr
Significant loss of lectin activityVaz et al. [158]
Chickpea
Soybean
Lentil
Peanut
Instant controlled pressure dropSteam pressure (up to 8 bar)
Temperature- 170°C
Duration- 3 min
Haemagglutinating activity of lectin is significantly reducedPedrosa et al. [159]