No, you CANNOT inject water into any version of the Mini GC (Mini GC, Mini GC Plus, or Go Direct Mini GC).
Injecting any sample that contains more than 5% water will dramatically shorten the lifetime of the detector.
Injecting any sample that contains more than 10% water will ruin the detector.
For more troubleshooting tips, see Mini Gas Chromatograph Troubleshooting and FAQs or Mini GC Plus Gas Chromatograph Troubleshooting and FAQs or Go Direct Mini GC Troubleshooting and FAQs