Assessment of the Accuracy of the Determination of Low Levels of Sodium in Fused Beads

✍ Scribed by H. L. Giles; P. W. Hurley

• Book ID: 102653315
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 532 KB
• Volume: 26
• Category: Article
• ISSN: 0049-8246
• DOI: 10.1002/(sici)1097-4539(199705)26:3<97::aid-xrs217>3.0.co;2-6

✦ Synopsis

In an earlier study, the accuracy of the determination of below about 0.5% (m/m) in samples prepared as Na 2 O fused beads was found to be poor with an RMS of 0.14 and a k factor of 0.11. Three possible sources of this inaccuracy were studied, and an improvement to an RMS of about 0.025 and a k factor of 0.025 was achieved by a combination of more careful determination of spectral overlap correction coefficients, allowance for crystal Ñuorescence in the setting of the pulse height selector and, most important, the preparation of new "cleanÏ beads. A comparison of the performance of a W-Si synthetic multilayer (PX1) and TlAP for the determination of in Na 2 O fused beads has emerged from this study.