• Title/Summary/Keyword: soy suace

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Analytical method validation and monitoring of levulinic acid in soy sauce and their application to food (간장 및 이를 활용한 식품의 레불린산 분석방법 검증 및 모니터링)

  • Kim, Dan-Bi;Kim, Sunyoung;Lee, Sanghee;Yoo, Miyoung
    • Analytical Science and Technology
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    • v.30 no.5
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    • pp.295-302
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    • 2017
  • This study presents a method validation for extraction and quantitative analysis of levulinic acid in soy sacues using high performance liquid chromatograph-photodiode array detector (HPLC-PDA). The levulinic acid in samples were extracted with distilled water, and then purified with C18 Sep-Pak cartridge. The calibration curves showed good linearity (R > 0.999) in a relatively wide concentration range ($2.5-400{\mu}g/mL$). Mean recoveries and relative standard deviation (RSD) of levulinic acid spiked in soy sauce samples at different spiking levels ($2.5-400{\mu}g/mL$; 6 point). Recoveries were 87.58-97.26 % with RSD less than 15 %, and limit of detection (LOD) and limit of quantification (LOQ) were 0.64 and $1.64{\mu}g/mL$, respectively. According to monitoring result with the established method, levulinic acid was found in 43 of 59 domestic commercial soy sauces, soy sauce based sauces and seasoned meats. The contamination levels were 0.44-1.23 mg/mL for soy sauces, 0.03-0.83 mg/mL for soy sauce based sauces and 8.43-38.94 mg/mL for seasoned meats. The results indicated to be rapidly and accurately qualifying levulinic acid and can be used as a suitable quality control method for soy sauce and soy sauce related commodities.

Studies on Taste Compound Content and Reasearch on Condition of Comsumer Attitude to Traditional Korean Soy Sauce with Varing Meju Type and Fermentation Jars (메주종류와 담금용기에 따른 전통간장의 맛성분과 소비자 사용실태조사)

  • 손경희;이현주;박현경;박옥진
    • Korean journal of food and cookery science
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    • v.14 no.5
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    • pp.463-467
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    • 1998
  • This study was carried out in order to analyze the changes in general compounds, reducig sugar, nitrogen compounds of traditional Korean soy sauce with varying Meju Type (Traditional Meju, Modified Meju) and ripening periods and to investigate correlation between sensory characteistics via sensory evaluation of soy sauce samples. And to investigate actual conditions and attitude of comsumer of soy suace.

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