Octanoate, methyl

Methyl octanoate (methyl caprylate) [111-11-5] M 158.2, b 83 /15mm, 193-194 /760mm, d 0.877, n 1.419. Passed through alumina before use. 

Methyl- branched Alkylester 7-Methyl-octanoate Heptanoate-7-methylester Octanoate-8-methylester Nonanoate-9-methylester Decanoate-10-methylester Heptanoate-7-ethylester Octanoate-8-ethylester Decanoate-10-ethylester Heptanoate-7-propylester Octanoate/7-methyl- octanoate Octanoate/octanoate-8-methylester or nonanoate-9-methylester or decano-ate-10-methylester or octanoate-8-ethylester or decanoate-10-ethylester Octanoate/5-me-thyl-octanoate or 6-methyl-octanoate ... 

Recovery ranged from 82% for Methyl Octanoate in fraction 1 to 73% for 2-Methyl-1-... 

The fruity-sweet flavours in elderberry juice and products have primarily been associated with aliphatic esters such as ethyl 2-methylbutanoate, ethyl 3-methylbutanoate, methyl heptanoate, methyl octanoate, methyl nonanoate, alcohols (2-methyl-l-propanol, 2-methyl-1-butanol and 3-methyl-1-butanol) and the aldehydes pentanal, heptanal and octanal [127, 129, 130, 132],... 

The spectrum of methyl octanoate is presented as Figure 2.14. This spectrum illustrates one difficulty in using the M + 1 peak to arrive at a molecular formula (previously mentioned, Section 2.4.1). The measured value for the M + 1 peak is 12%. The calculated value is 10.0%. The measured value is high because of an ion-molecule reaction because a relatively large sample was used to see the weak molecular ion peak. 

Air passed through a solid sorbent tube containing octanoic acid-coated XAD-2 resin (100 mg/50 mg) diazomethane converted to methyl octanoate the product desorbed with CS2 (more than 30 min contact time) and analyzed by GC-FID (NIOSH Method 2515, 1985) recommended flow rate 0.2 L/min sample volume 20 L. 

Multiply the concentration of methyl octanoate by the stoichiometric factor 0.266 to calculate the concentration of diazomethane. 

FID) response factors were not determined for each identified pineapple constituent. Qualitative and quantitative differences were noted between samples and it was observed (by GC/MS) that ethyl heptanoate eluted as a shoulder on the 6-methyl-5-hepten-2-one peak in some runs. Therefore, the use of 6-methyl-5-hepten-2-one was discontinued in later runs. The major compounds found were methyl hexanoate, methyl 2-methylbutanoate, methyl butanoate, methyl octanoate, methyl s-methylthiopropanaote and ethyl acetate. 

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