GB/T 33396-2016 in English

Overview of GB/T33396—2016 Standard

This standard specifies the method for determining the halogen (fluorine, chlorine, bromine, iodine) content in triacetylcellulose (TAC) film, and is applicable to the detection of halogen content in optical functional films and other film materials.

Background of Standard Formulation

With the development of optical film technology, halogen, as an important element, plays a key role in film manufacturing. The formulation of GB/T33396—2016 fills the gap in the domestic detection method of halogen content in optical functional films and provides a unified technical specification for the industry.

Technology Evolution Analysis

The traditional halogen detection method has problems such as low sensitivity and complex operation. This standard adopts oxygen bomb combustion-ion chromatography, combined with modern instruments and equipment, which significantly improves the accuracy and efficiency of detection.

Instrument and equipment requirements

Ion chromatograph is the core equipment and must meet the following conditions:

• Chromatographic column: hydroxide selection, high-capacity anion exchange column compatible with gradient elution
• Suppressor: continuous automatic regeneration membrane anion suppressor
• Detector: conductivity detector

Implementation recommendations

To ensure the effective implementation of the standard, it is recommended that:

1. Operators must undergo professional training
2. Instruments must be calibrated regularly
3. Experimental environmental conditions must be strictly controlled