What type of tape should be used for sealing oil sample jars?

The use of electrical tape for sealing oil sample jars is correct because it provides a durable and tight seal that is resistant to corrosive materials typically found in oil samples. Electrical tape is designed to withstand various environmental conditions, ensuring that the integrity of the sample is maintained during storage and transportation. This type of tape also has good adhesive qualities, helping to prevent any leakage that could compromise the sample or create hazards in the sampling environment.

In contrast, other types of tape such as duct tape may not provide a secure enough seal or could interact negatively with the substances in the oil sample. PVC tape is generally used for plumbing and electrical applications and may not adhere well to the surfaces of glass or plastic oil sample containers. Masking tape, while good for temporary applications, does not have the necessary strength or resistance for long-term sealing of containers that hold volatile materials like oils. Hence, electrical tape is the most suitable option for ensuring the safety and integrity of oil samples.