Parameters Na - tetraphenylborate
Optimum concentration range (mg/25ml)
Intercept of the regression line a
Slope of regression line
Student’s tb ( 2.310 )c
Range of error (%)
2.50–13.45
1.227
0.993
1.837
± 0.74
aObserved vs. theoretical.
b Comparison with pharmacopoeial method [24]
c
Value in parenthesis is the theoretical t-value for five degrees of freedom
Table 2: Linear regression analysis for FEX using sodium tetraphenylborate.