Doc # QCL/FRM-7.
01
Orignal issue
1st Jan 2019
Uncertainity date
Caluculation sheet Current
Issue date
1st Feb 2021
Revision
Number
2
Test Title Determination of Density of imidacloprid 20 % SL
Test Method Hydrometer Method
Method Reference CIPAC method
Date 5-Jul-21
Sample B#20210601 , QCL-PS-476
Equipment Hydrometer and Digital Density meter
S# Observations Analyst 1 Analyst 2 SD (R)
1 Replication -1 1.075 1.076 -
2 Replication-2 1.072 1.072 -
3 Replication-3 1.071 1.077 -
4 Average 1.073 1.075 -
5 Mean value of average 1.074
6 SD 0.0021 0.0026 -
Uncertainty of Repeatability i.e. SD 0.00265 units
UNCERTAINTY MEASUREMENT (Budget)
Results of
Sensitive Relative
S# Sources Distribution Type A/B K Factor Standard
coefficient Unc
Unc
1 Repeatability Normal A1 1 1 0.0026 0.0026
2 Hydrometer Reactangular B1 2 1 0.010 0.0025
3 Water bath Reactangular B2 2 1 0.040 0.0007
UNCERTAINTY MEASUREMENT RESULTS
Sum of Standard Unc 0.000014
Combined Uncertainty (Uc) 0.0037 @ 68 % CL
Confidence Level (K) 2.0 = 95% CL
Expanded Uncertainty (Ue) 0.0074 @ 95% CL
Result Summary
Uncertainty 0.0074 units
Upper Result Limit 1.081 units
Average 1.074 units
Lower Result Limit 1.066 units
Prepared By Reviewed by Approved by
Name Farhan Younas M.Asif Naeem M.Ameen Ahmad
Designati ISO Coordinator DQMR Manager QC
Signature
Date
Formulas Used in Calculation of Measurement of Uncertainty
S_x = √((∑_( i=1)^( n)▒ 〖
(x_i-x ̅ ) 〗 ^2 )/(n-1))
Standard Deviation
_____________________________________
x ̅ = The mean of x_i
n = The number of data points
x_i = Each of the values of the data
CU = √(∑▒ 〖〖 U 〗 _r^2+ 〗
Combined Uncertainty
U_R^2+U_e^2+U_m^2 )
U_r = Uncertainty of Repeatability
____________________________________________
U_R = Uncertainty of Reproducibility
U_e = Uncertainty of Equipment
U_m = Uncertainty of Method
