Food and Fermentation Industries >

2022 , Vol. 48 >Issue 17: 230 - 235

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.032096

Eucheuma sp. waste residue adsorption capacity of sodium nitrite

  • GUO Jie ,
  • SHI Feng ,
  • SUN Manman ,
  • MA Fanqi ,
  • LI Yongfu
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  • 1(State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China)
    2(Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China)
    3(Shanghai Brilliant Gum Co.Ltd., Shanghai 201114, China)
    4(National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, Wuxi 214122, China)

Received date: 2022-04-23

  Revised date: 2022-05-17

  Online published: 2022-10-01

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Abstract

Sodium nitrite is one of the most toxic food additives, and insoluble dietary fiber (IDF) can scavenge sodium nitrite. To reduce the harm caused by sodium nitrite to humans, this paper studied the chemical composition of Eucheuma sp. waste residue after extracting carrageen. Then the Eucheuma sp. waste residue was pulverized to be ultrafine powder, and their hydration characteristics and cation exchange capacity were determined. On this basis, their capacity to adsorb sodium nitrite and ability to block nitrosamine synthesis under the simulated gastric juice in vitro was investigated. Results showed that the IDF content of Eucheuma sp. waste residue was up to 90.1%. Their maximum water holding capacity and expansion capacity reached (5.61±0.06) g/g and (5.67±0.30) mL/g, respectively, and their maximum cation exchange capacity was (0.32±0.02) mmol NaOH/g. More interestingly, they could adsorb (70.0±0.4)% sodium nitrite within 5 min and the adsorption ratio reached (93.1±0.7)% after equilibrium. The IC50 value was 0.87 mg/mL, and the adsorption capacity was up to (18.376±0.066) mg/g. The adsorption accorded with the Freundlich isotherm model and pseudo-second-order kinetic model. Furthermore, their blocking rate of nitrosamine synthesis reached (65.2±2.1) %. In conclusion, the ultrafine powder of Eucheuma sp. waste residue has excellent physicochemical properties, sodium nitrite adsorption capacity, and nitrosamine synthesis blocking ability, thereby it is suitable for developing sodium nitrite scavengers.

Key words： Eucheuma sp. waste residue; insoluble dietary fiber; ultrafine grinding; physicochemical properties; sodium nitrite adsorption capacity; nitrosamine synthesis blocking ability

Cite this article

GUO Jie , SHI Feng , SUN Manman , MA Fanqi , LI Yongfu . Eucheuma sp. waste residue adsorption capacity of sodium nitrite[J]. Food and Fermentation Industries, 2022 , 48(17) : 230 -235 . DOI: 10.13995/j.cnki.11-1802/ts.032096

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