Analysis of Free Lactic Acid in Fermented Foods by Gas ChromatographyMethod principle:send outFermentation FormulalawProduced foodarticlecausea surnameThe production of lactic acid bacteriauseAnd containsoneQuantitative free lactic acid,Lactic acid is not only fermented, but alsoeatProduct'swindTaste substancesnature,alsoIt is a substance produced in large quantities during sournessnature、placeuseThe determination of its content is crucial for fermentationeatarticleofwindTaste evaluationpriceandhygienenaturemeasureinspectTesting is of great significancejustice. presenthaveGas phase color of lactic acid in fermented foodstableMeasurement is mostly done firstgo outFree lactic acid、And then vinegar,Time-consuming operation,And easygive birth toRaw samplesarticlelossAnd pollutiondye、Retention of componentstimeJianyi EffectlongThis article studiesfinishfermenteatarticlemiddle reachesleaveLactic acidGas phasecolourSpectrum directlyAnalysis method,send outleaveneatarticleXiangProduct processsimplePre processing is carried outstraightconnectinjectionmeasuretry,receivefinishfastfast、simpleprompt、High sensitivity effect.

Classic gas chromatography analysis spectrum

Analysis of Free Lactic Acid in Fermented Foods by Gas ChromatographyConfiguration and reagents

GC-2020 gas chromatograph（）Performance characteristics

1. Adopting320 x 240dot matrix5.7An inch large screen LCD Chinese display, real-time display of various temperatures and operating conditions, clear and intuitive content, truly realizing human-machine dialogue;
2Power on self-test, wide range self diagnostic function, can accurately determine the fault location and alarm;
3Six independent temperature controls (vaporization chamber and capillary vaporization chamber can be independently controlled), Five level program heating function;
4Overtemperature Protection function: If any circuit exceeds the set temperature, the instrument will automatically power off and sound an alarm;
5The vertical heating device of * makes sample vaporization more reliable, reduces the heat radiation generated in the vaporization chamber to the minimum, and ensures minimal temperature deviation inside the column box;
6Intelligent fuzzy control rear door opening system, automatically tracks temperature and dynamically adjusts The angle of the air door can achieve precise temperature control even near room temperature;
7Configure filling column head injection, glass lining injection, with diaphragm cleaning Functional capillary diversion/Non split injection device and capable of installing gas injectors;
8High precision dual stable gas path, capable of installing four types of detectors simultaneously;
9Optional electronic flow pressure display system with built-in workstation device.

Temperature control indicators
1.Temperature control range: room temperature 5℃～400℃increment0.1℃
2.Temperature control accuracy: superior to±0.01℃

Program heating: Five step interval constant temperature time0～999minincrement0.1minTemperature increment0.1℃
Heating rate:200℃The biggest one below40℃/min200℃Up to the biggest20℃/min