Table 7 The results of gross alpha and gross beta activity concentrations for water samples from proficiency tests.

From: Simultaneous determination of gross alpha/beta activities in water by liquid scintillation counting and its applications in the environmental monitoring

Sample No

Total solid content (mg L−1)

SQP(E)

Gross alpha activity concentration

Gross beta activity concentration

Reference value (Bq/L)*

Measured value (Bq/L)*

Z-Score

Reference value (Bq/L)*

Measured value (Bq/L)*

Z-Score

IS-2019

6.89 E + 02

796.3

(8.80 ± 0.30) E−01

1.04 ± 0.04

1.0

(6.20 ± 0.20) E−01

(6.92 ± 0.33) E−01

0.9

IS-2020

1.42 E + 03

795.4

(7.80 ± 0.40) E−01

(6.51 ± 0.55) E−01

− 1.2

(3.50 ± 0.20) E−01

(3.10 ± 0.24) E−01

− 0.8

  1. *The expanded uncertainty corresponds to k = 1.
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