Monitoring biogenic amines,which are metabolic byproducts of shrimp spoilage,is crucial for assessing food quality.Currently,most detection methods for biogenic amines suffer from limitations such as time-consuming pr...Monitoring biogenic amines,which are metabolic byproducts of shrimp spoilage,is crucial for assessing food quality.Currently,most detection methods for biogenic amines suffer from limitations such as time-consuming procedures,complex operations,and delayed results.Colorimetric analysis techniques have gained attention in recent years due to their advantages of short analysis time,simple operation,and suitability for on-site testing.This study successfully developed a series of colorimetric sensor platforms for biogenic amines by loading the natural active ingredient curcumin(CUR)and its derivative of Boron complex BFCUR onto filter paper and electrospun nanofibre films(ENFs),respectively.By analyzing the color response differences of these sensors upon contact with biogenic amines,the colorimetric sensors with superior detection performance were selected and further applied to the visual monitoring and indication of shrimp spoilage processes.展开更多
A study was carried out to determine arsenic species in seafood samples collected from Chinese sea. The information about arsenic species in samples was provided by high performance liquid chromatography-inductively c...A study was carried out to determine arsenic species in seafood samples collected from Chinese sea. The information about arsenic species in samples was provided by high performance liquid chromatography-inductively coupled plasma mass spectrometer (HPLC ICP MS) and electrospray tandem mass spectrometry (ES MS MS). The arsenic species in thirty Chinese edible seafoods, including algae, fish, crab, shrimp, mussels, oysters, and clams popularly ingested by Chinese people as regular foods, were examined in the present report. Arsenosugars were detected in all of the extracted algae samples (1 5—33 8μg·g -1 dry weight) and some shellfish samples (0 018—0 78μg·g -1 wet weight). Arsenobetaine was detected in all of the extracted fish and shellfish samples (0 025—6 604μg·g -1 wet weight). In contrast, inorganic arsenic was only present in the examined fish and shellfish samples, at levels less than 2% of the total arsenic. The study provides information about a possible distribution pattern of arsenic species in seafood products.展开更多
利用反相微乳技术合成了稀土铕-S iO2纳米颗粒,用其与氯霉素单克隆抗体结合制备氯霉素类残留物免疫检测探针,并制备免疫层析试纸条,用于牛奶中氯霉素和氯霉素琥珀酸盐同步检测,简便快速,30 m in内出结果。与甲砜霉素、庆大霉素、磺胺二...利用反相微乳技术合成了稀土铕-S iO2纳米颗粒,用其与氯霉素单克隆抗体结合制备氯霉素类残留物免疫检测探针,并制备免疫层析试纸条,用于牛奶中氯霉素和氯霉素琥珀酸盐同步检测,简便快速,30 m in内出结果。与甲砜霉素、庆大霉素、磺胺二甲基嘧啶之间无交叉反应,特异性好,未发现非特异性吸附问题。展开更多
The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and th...The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and thin layer chromatography. Ultraviolet-visible spectrophotometry and laser desorption ionization-time of flight mass spectrometry were employed to characterize the vanadium porphyrins. The vanadium porphyrins in Tahe crude oil are chiefly ETIO homologues(C 26～C 39) with a small amount of DPEP homologues (C 29～C 39) and RHODO-ETIO homologues(C 29～C 39).展开更多
基金Supported by the Guangdong-Hong Kong-Macao Joint Laboratory on Micro-Nano Manufacturing Technology,China(No.2021LSYS004)Guangdong Provincial Key Laboratory of Sustainable Biomimetic Materials and Green Energy,China(No.2024B1212010003)。
文摘Monitoring biogenic amines,which are metabolic byproducts of shrimp spoilage,is crucial for assessing food quality.Currently,most detection methods for biogenic amines suffer from limitations such as time-consuming procedures,complex operations,and delayed results.Colorimetric analysis techniques have gained attention in recent years due to their advantages of short analysis time,simple operation,and suitability for on-site testing.This study successfully developed a series of colorimetric sensor platforms for biogenic amines by loading the natural active ingredient curcumin(CUR)and its derivative of Boron complex BFCUR onto filter paper and electrospun nanofibre films(ENFs),respectively.By analyzing the color response differences of these sensors upon contact with biogenic amines,the colorimetric sensors with superior detection performance were selected and further applied to the visual monitoring and indication of shrimp spoilage processes.
文摘A study was carried out to determine arsenic species in seafood samples collected from Chinese sea. The information about arsenic species in samples was provided by high performance liquid chromatography-inductively coupled plasma mass spectrometer (HPLC ICP MS) and electrospray tandem mass spectrometry (ES MS MS). The arsenic species in thirty Chinese edible seafoods, including algae, fish, crab, shrimp, mussels, oysters, and clams popularly ingested by Chinese people as regular foods, were examined in the present report. Arsenosugars were detected in all of the extracted algae samples (1 5—33 8μg·g -1 dry weight) and some shellfish samples (0 018—0 78μg·g -1 wet weight). Arsenobetaine was detected in all of the extracted fish and shellfish samples (0 025—6 604μg·g -1 wet weight). In contrast, inorganic arsenic was only present in the examined fish and shellfish samples, at levels less than 2% of the total arsenic. The study provides information about a possible distribution pattern of arsenic species in seafood products.
文摘The isolation and characterization of vanadium porphyrins in Tahe crude oil has been carried out. The vanadium porphyrins were at first isolated by methanol extraction and then purified by column chromatography and thin layer chromatography. Ultraviolet-visible spectrophotometry and laser desorption ionization-time of flight mass spectrometry were employed to characterize the vanadium porphyrins. The vanadium porphyrins in Tahe crude oil are chiefly ETIO homologues(C 26～C 39) with a small amount of DPEP homologues (C 29～C 39) and RHODO-ETIO homologues(C 29～C 39).
