
Fused Silica vs Quartz Capillary Tube: Purity, Optics and Heat
Most laboratories and procurement teams treat these two materials as interchangeable — that assumption leads to analytical errors, premature tube failure, and wasted resources. Quartz capillary tubes and fused silica capillary tubes share the same chemical formula (SiO₂) yet diverge fundamentally in raw material origin, purity, optical transmission, thermal ceiling, and surface chemistry. This article resolves every technical distinction with













