Updated U234 blank calculation

Author: tiger-b

Back End/MIT_reduceSample.m

@@ -133,16 +133,13 @@
 % Calculate masses for procedural blank
 blank_mass.Th230_fg = blank_spk.Th.Th230_Th229 * spk.Th229 * 230 * blank_r.spk_wt * 1000;
 blank_mass.Th232_pg = blank_spk.Th.Th232_Th229 * spk.Th229 * 232 * blank_r.spk_wt;
+blank_mass.U234_fg = blank_spk.U.U234_U233 * spk.U233  * 234 * blank_r.spk_wt * 1000;
 blank_mass.U238_pg  = blank_spk.U.U238_U236    * spk.U233  * 238 * blank_r.spk_wt * spk.U236_U233;
-% conditional statement for U234 
-if blank_spk.U.U234_U233 * spk.U233 * 234 * blank_r.spk_wt * 1000 > blank_mass.U238_pg / 15
-    blank_mass.U234_fg = blank_spk.U.U234_U233 * spk.U233  * 234 * blank_r.spk_wt * 1000;
-else
+if blank_mass.U234_fg < blank_mass.U238_pg / 15 % conditional statement for U234 
     blank_mass.U234_fg = blank_mass.U238_pg / 15;
 end
 
 
-
 % Apply blank correction to sample
 sampU_blnk.U238_U236          = sampU_spk.U238_U236*(1 - blank_mass.U238_pg /...
                                 (spk.U233 * powder.spk_wt * 238 * sampU_spk.U238_U236 / spk.U236_U233));

UTh-reduced-data-10-May-2024.xls

@@ -1,4 +1,4 @@
-Date of reduction: 10-May-2024 14:42:18
+Date of reduction: 10-May-2024 15:10:02
 Version of script: 1.1.021524 
 
 FILENAMES OF RAW DATA FILES
@@ -56,7 +56,7 @@ CC5A	27.200000000000	131.000000000000	13900.000000000000	11.700000000000	1.38000
 
 PROCEDURAL BLANK MASSES
 230Th (fg)	232Th (pg)	234U (fg)	238U (pg)
-0.099816626680	1.249015975388	3.872064264579	0.258137617639
+0.099816626680	1.249015975388	0.258137617639	3.872064264579
 
 FINAL SAMPLE CONCENTRATIONS AND AGES
 Sample Name	238U	±(2sig)	232Th	±(2sig)	d234U	±(2sig)	(230Th/238U)	±(2sig)	230Th/232Th	±(2sig)	Age (uncorr)	±(2sig)	Age (corr)	±(2sig)	d234init	±(2sig)	Age (corr)	±(2sig)