Table 8.

Results of repeatability and intermediate precision.

No. of sample solution	Sample weight (g)	Content of potassium guaiacolsulfonate in oral powder (%, comparing to labeled amount)	Content of sodium benzoate in oral powder (%, comparing to labeled amount)
Day 1, analyst 1
1	0.6152	98.1	101.8
2	0.6224	100.8	100.0
3	0.6369	99.6	101.1
4	0.6102	98.7	102.7
5	0.6224	100.7	99.9
6	0.6394	99.4	100.8
Average (1–6)		99.6	101.0
RSD (%) (1–6)		1.1	1.1
Day 2, analyst 2
7	0.6542	100.3	101.9
8	0.6395	99.2	101.5
9	0.6452	101.3	101.3
10	0.6531	100.4	102.3
11	0.6407	99.0	101.3
12	0.6446	101.6	99.4
Average (1–12)		99.9	101.2
RSD (%) (1–12)		1.1	1.0

Note: results obtained in day 1 by analyst 1 (sample no. 1–6) were used for evaluating repeatability, and those obtained in day 1 and day 2 (sample no. 1–12) were used together for evaluating intermediate precision.