Al

Serial

number

Recommended

value

Analysis

value

Absolute

error

Relative

error (%)

A3

90.086

98.062

0.079

0.080

A9

96.060

94.494

−0.016

−0.010

A13

96.275

97.873

0.017

0.010

A17

87.699

82.849

−0.055

−0.060

Ave

95.084

98.840

0.040

0.040