title: Identification and occurrence of endogenous semicarbazide in prawns and crabs from Zhejiang Province, China.
abstract: Semicarbazide (SEM) is a side-chain metabolite of the antibiotic drug nitrofurazone (NFZ) and is employed as a conclusive marker for the use of banned NFZ. Recent studies have shown that SEM in aquatic crustaceans can be derived natively or from other sources. The presence and distribution of endogenous SEM within aquatic crustaceans is examined in this paper, which finds that the SEM content varies amongst the muscle, shell, and viscera of various prawn and crab species within the range of 0.35-26.62 ng g(-1). The effects of heating and hypochlorite treatment on SEM levels were examined. The results indicate that thermal processing introduced a more significant impact, resulting in a maximum SEM value of 15.48 ng g(-1) in a sample of shell of Portunus trituberculatus crab, while SEM levels in muscle samples were not affected by the duration of heating. Though 6% active chlorine treatment led to SEM production ranging between 39.9 and 196.4 ng g(-1) in muscle samples from various crustaceans, SEM is unlikely to originate from hypochlorite or chlorine in practice where there are limits to actual chlorine in sanitation water and facilities. 5-Nitro-2-furaldehyde (NF) was proposed as a selective marker to differentiate between endogenous SEM and NFZ-derived SEM in seafood.
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Zhang
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.|b Marine and Fisheries Research Institute , Zhejiang Ocean University , Zhoushan , China.
authors.forename: Si
authors.initials: S
authors.lastname: Chen
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.|b Marine and Fisheries Research Institute , Zhejiang Ocean University , Zhoushan , China.
authors.forename: Hanxiang
authors.initials: H
authors.lastname: Xu
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.|b Marine and Fisheries Research Institute , Zhejiang Ocean University , Zhoushan , China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.
authors.forename: Zhongyong
authors.initials: Z
authors.lastname: Yan
authors.affiliation: a Key Lab of Mariculture and Enhancement , Marine Fisheries Research Institute of Zhejiang Province , Zhoushan , China.
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
mesh_terms: D000818:Animals; D003386:Brachyura / Q000737:chemistry*; D002681:China; D005504:Food Analysis; D005506:Food Contamination / Q000032:analysis*; D033561:Penaeidae / Q000737:chemistry*; D012663:Semicarbazides / Q000032:analysis*; D012758:Shellfish / Q000032:analysis*
chemical_list: D012663:Semicarbazides; C010059:carbamylhydrazine
keywords: Semicarbazine; crabs; heat; hypochlorite treatment; prawns