GB/T 4734-2022 in English

1. Multi-element combined determination technology

The atomic absorption spectrometry is used to realize the simultaneous detection of K, Na, Li, Ca, Mg, Fe and other elements, and the analysis efficiency is improved by 300%:

• Detection limit: 0.1μg/mL (1% absorption)
• Wavelength accuracy: ±0.02nm
• Relative standard deviation ≤2%

Application Case: Determination of B₂O₃ in Ceramic Glazes

When using the mannitol enhanced titration method:

1. Sample pretreatment needs to strictly control pH=6.5-7.0
2. Barium carbonate addition amount 4g±0.1g
3. End point determination repeatability reaches ±0.05%

• Standard curve verification cycle ≤3 months
• Temperature fluctuation＞10℃ requires recalibration
• The allowable difference is determined by 0.7 times the stringent standard

The sum of all components in the full analysis should be within the range of 99.50%-100.50%, otherwise additional analysis is required according to Appendix E.