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3、14, . . 2 : 54227 2010 (CEN/TS 15442:2006) . 54228 2010 (CEN/TS 15443:2006) . 54229 2010 (CEN/TS 15413:2006) . 54235 2010 (CEN/TS 15357:2006) . 55119 2012 (CEN/TS 15440) . , 1 , , , . , , (). , , , , , . , , , , . 3 54235, : 3.1 (biogenic carbon): , , . 3.2 (biomass carbon): . 3.3 (biomass content):
4、 , . 3.4 (isotope abundance): . 55129 2012 2 3.5 (percentage modern Carbon (pmC): (SRM4990B). 95 % . 2006 . 100 % 107 pmC. 4 : 4.1 14 14 4.2 AMS -; -, , ; BI -; Bq , ; daf ; DPM ; CPM ; GM -; LLD ; MOP 3- ; LSC ; REF 100 % ; PSM ; pmC , ; RSD ; SRF ; UHV . 5 () (, Carbasorb E); (, Permafluor E+); (
5、, 4 NaOH); 4 NaOH . IV () NaOH. NaOH (, , ). Na2CO3. 2 . NaOH , - . NaOH : 6700 ; 1120 NaOH; 300 Ba(OH)2. ( 25 Ba(OH)2 300 ); NaOH ( ); Ba(OH)2 80 , . 8 , 8 . . . , , . 55129 2012 3 6 , , 14. 14. , 14. (PSM), - (BI) - (AMS). , . . , . 7 7.1 , , 54227 54228. 54229. 7.2 , , 14 , 14, : (7.3), (7.5) (7.
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