HCBBS Forum (English)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

【Daily Question】Chemical Analysis Edition, 11.25.2018

2018-11-25View Original

Thread Content

This post was last edited by zjp on 2018-11-25 08:03. Multiple-choice question: Which of the following points should be taken into consideration when using a liquid chromatograph? ( ) A. Use a pre-column to protect the analysis column. B. Avoid drastic changes in the composition and polarity of the mobile phase. C. The mobile phase must be degassed and filtered before use. D. A drop in pressure is a signal that the pre-column needs to be replaced. ABC

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.