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Titolo:
REPORT ON COOPERATIVE DETERMINATION OF MO LECULAR-WEIGHT AVERAGES OF POLYMERS BY SIZE-EXCLUSION CHROMATOGRAPHY .3. ON THE POLYMER STANDARDSFOR CALIBRATION
Autore:
MORI S; TAKAYAMA S; GOTO Y; NAGATA M; KINUGAWA A; HOUSAKI T; YABE M; TAKADA K; SHIMIDZU M; OOSHIMA N; SUGITANI H; OOZEKI H; NAKAHASHI K; HIBI K; NAKAMURA S; SUGIURA K; TANAKA T; OGIWARA S;
Indirizzi:
JAPAN SOC ANALYT CHEM,RES COMM POLYMER ANAL,SECT SPECIAL STUDY SEC,SHINAGAWA KU TOKYO 141 JAPAN
Titolo Testata:
Bunseki Kagaku
fascicolo: 5, volume: 45, anno: 1996,
pagine: 447 - 453
SICI:
0525-1931(1996)45:5<447:ROCDOM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
JPN
Keywords:
SIZE EXCLUSION CHROMATOGRAPHY; MOLECULAR WEIGHT AVERAGES; ROUND ROBIN TEST; POLYSTYRENE; STANDARDS FOR CALIBRATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
S. Mori et al., "REPORT ON COOPERATIVE DETERMINATION OF MO LECULAR-WEIGHT AVERAGES OF POLYMERS BY SIZE-EXCLUSION CHROMATOGRAPHY .3. ON THE POLYMER STANDARDSFOR CALIBRATION", Bunseki Kagaku, 45(5), 1996, pp. 447-453

Abstract

The weight average molecular weight (M(W)) of polystyrene samples determined in the first round robin test (RR-1) was compared with those in the second round robin test (RR-2) to analyse the difference in polystyrene standards for calibration. The data were divided into two groups: data determined at laboratories that used the standards obtained by the identical vendor in both RRs (case 1) and those using the standards of different vendors for RR-1 and RR-2 (case 2). The RR-1: RR-2 ratios for M(W) in case 1 were 1.03 similar to 1.04 in average, but the maximum was 1.17 and the minimum 0.95. By careful adjustment of calibration conditions, the RR-1: RR-2 ratios for M(W) were reduced to 1.01 similar to 1.03. In case 2, as long as a calibration was constructed by passing through most data points smoothly, there was no distinct difference in calculated M(W) among standards from different vendors. Therelative standard deviation of these data, obtained carefully as mentioned above, were 3.9%.

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Documento generato il 30/09/20 alle ore 02:30:17