Determination Of Cholesterol Oxidation Products (COPS) In Meat Products Using Triple Quadrupole Gas Chromatography-Mass Spectrometry (GC-MS-MS)

This study is to observe the best method in quantifying COPS in meat products using triple quadrupole gas chromatography-mass spectrometry (GC-MS-MS). Derivatisation technique was optimised using TMS1:pyridine prior to quantification. Multiple reaction monitoring (MRM) transition with electron io...

وصف كامل

محفوظ في:
التفاصيل البيبلوغرافية
المؤلف الرئيسي: Shazamawati Binti Zam Hashari
التنسيق: أطروحة
اللغة:en_US
الموضوعات:
الوسوم: إضافة وسم
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الوصف
الملخص:This study is to observe the best method in quantifying COPS in meat products using triple quadrupole gas chromatography-mass spectrometry (GC-MS-MS). Derivatisation technique was optimised using TMS1:pyridine prior to quantification. Multiple reaction monitoring (MRM) transition with electron ionization (EI) was developed by isolating and fiagmenting the precursor ion. Three extraction methods were compared (Method A, B and C). The developed method was tested in minced beef, chicken sausage and fish fillet. The effect of types of cooking such as boiling and frying were compared with untreated raw samples. To conclude, derivatisation with 100 ml of TMS1:pyridine (1 :4); 80 minute of incubation time at 60 OC was the best since it gave among the largest peak area. Good chromatographic separation with shorter retention time (12 minutes), recoveries (96 - I0 l % for 5 mg/kg and 95 - 10 l % for 50 mg/kg), repeatability ( 1-5 % for 5 mg/kg and 1-3 % for 50 mg/kg) and correlation coefficients (between 0.993 and 0.999) with the range of limit of detection (LOD) and limit of quantitation (LOQ) was between 0.06 - 1.84 and 0.18 - 5.58 mg/kg respectively proved that GC-MS-MS with El fragmentation is reliable to quantitate COPs. Method C, gave higher recovery (41.35 % - 66.33 %) and lower range of coeffticient of variation (CV) (4.08 % - 17.3 %). Frying was observed to generate highest COPS level implies that it is not a healthy cooking method.