Journal of Food Processing and Preservation

Volume 42, Issue 1 e13334

Original Article

Effectiveness of electron beam irradiation for microbial decontamination of turmeric powder (Curcuma longa Linne) and analysis of curcuminoid degradation

Rumi Yamaoki,

Corresponding Author

Rumi Yamaoki

[email protected]

orcid.org/0000-0001-9521-3436

Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Correspondence Rumi Yamaoki, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. Email: [email protected]Search for more papers by this author

Shojiro Kimura,

Shojiro Kimura

Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Search for more papers by this author

Rumi Yamaoki,

Corresponding Author

Rumi Yamaoki

[email protected]

orcid.org/0000-0001-9521-3436

Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Correspondence Rumi Yamaoki, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. Email: [email protected]Search for more papers by this author

Shojiro Kimura,

Shojiro Kimura

Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan

Search for more papers by this author

First published: 09 May 2017

https://doi.org/10.1111/jfpp.13334

Citations: 9

Funding information: The Seven Chemical Co., Ltd

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Abstract

The effectiveness of electron beam (EB) disinfection and sterilization technology when applied to turmeric powder (Curcuma longa Linne) was investigated. The bacteria in turmeric powder were sensitive to EB irradiation. From an initial turmeric aerobic bacterial count of 10⁷ colony-forming units per gram (cfu/g), a microbial contamination level of below 1.0 × 10³ cfu/g was obtained at an absorbed dose of more than 7 kGy EB irradiation. EB irradiation at 10 kGy gave a contamination level of less than 10 cfu/g after 1 year of storage at room temperature. At the irradiation level necessary for decontamination of turmeric powder, the amount of dilute ethanol-soluble extract from the sample was 9% greater than the level from a non-irradiated turmeric powder. HPLC analysis of an irradiated sample indicated that EB radiolysis of curcuminoids was less than the level detectable by instrumental analysis.

Practical applications

Radiosterilization has been recognized as an effective method for controlling microorganisms and for extending the shelf life of food. In particular, EB irradiation is economically advantageous over gamma irradiation because of the higher EB dose rate. This study evaluates the use of 4.8 MeV EB radiation for the decontamination of turmeric powder for food additive and pharmaceutical uses. This method is found to be effective for sterilization and avoiding degradation of the yellow pigment components.

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Effectiveness of electron beam irradiation for microbial decontamination of turmeric powder (Curcuma longa Linne) and analysis of curcuminoid degradation

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Effectiveness of electron beam irradiation for microbial decontamination of turmeric powder (Curcuma longa Linne) and analysis of curcuminoid degradation

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