Standard Practice for Determination of the Slope in the Linear Region of a Test Record

2018 ◽  
Author(s):  
Keyword(s):  
Linear Region ◽  
Standard Practice ◽  
Test Record

Determination of the signature of a dynamite source using source scaling, Part 2: Experiment

Geophysics ◽  
1993 ◽  
Vol 58 (8) ◽  
pp. 1183-1194 ◽  
Author(s):  
Anton Ziolkowski ◽  
Karel Bokhorst
Keyword(s):  
Seismic Data ◽  
Scaling Law ◽  
Estimation Methods ◽  
Acceptable Error ◽  
Test Charge ◽  
Source Scaling ◽  
Test Record ◽  
Seismic Data Acquisition ◽  
Made In

In April 1990 we performed an experiment in the Netherlands to test the theory of the determination of the signature of a dynamite source using the scaling law. The theory says that the source signature may be determined from the recorded seismic data using two shots of different charge size at the shotpoint; we used 125 g and 500 g charges. The theory was put at risk with a 250-g test charge at each shotpoint. According to the theory, the test record should be different from the other two and, apart from the noise, should be predictable from them. This experiment was repeated 95 times at approximately 50 m shotpoint intervals, using a 240-channel recording system. The results corroborate the theory within an acceptable error. The second‐derivative of the volume injection function was extracted as the source signature; it varied slightly from shot to shot and was minimum phase. This new method of seismic data acquisition allows the signature of the dynamite source to be obtained from the data, uncontaminated by the earth, and avoids the assumptions that must be made in statistical wavelet estimation methods. If there is good shot‐to‐shot repeatability, the second shot is only needed occasionally for calibration.

scholarly journals Determination of copper metals in leachate using potentiometric method by concentration cells

2018 ◽  
Vol 49 ◽  
pp. 02018
Author(s):  
Suheryanto ◽  
Zainal Fanani ◽  
Dewi Jayanti
Keyword(s):  
Selectivity Coefficient ◽  
Potentiometric Method ◽  
Cell Type ◽  
Copper Metal ◽  
Linear Region ◽  
Average Accuracy ◽  
Leachate Water ◽  
Concentration Cells ◽  
Determination Of Copper

The potentiometric method of cell type concentration is used to analyze the copper metal in leachate. This method is relatively good because it has a correlation coefficient of 0.9997 and linear region in the concentration range 1×10-5 1×10-3 mol L-1. The precision of this potentiometric method is low because the persent of RSD produced is 0.6% with an average accuracy 0f 95.35%. The detection limit (LoD) of the measurable method is 1.085×10-6 mol L-1 with LoQ 1.313×10-6 mol L-1. While the LoD instrument 1.217×10-6 mol L-1 and LoQ 1.560×10-6 mol L-1. In addition, this method is very selective with the selectivity coefficient of -3.7 and it has uncertainty of measurement 9.7×10-7 ± 1.282×10-6 to 9.12×10-5 ± 3.5×10-5. Potentiometric method of cell type of concentration has an optimum condition at pH5 and temperature 30˚C.The conditions of copper in leachate water renged from 9.253×10-5 to 8.696×10-4 mol L-1

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