Sample

No.

Certified Reference Materials

(Composition, %)

Arsenic (%)

In C.R.M

sample

Found

(n = 5)

RSD^b

1

GBW01622: Unalloyed steel: Ag = 0.3, As =72, Bi = 0.5, Ca = 32, Cd = 1.9, Ga = 28, In = 0.4, Mg = 53, Pb = 2.2, Sb = 7.4, Se = 43, Sn = 0.164, Te = 0.5, Ti = 8.1, Zn = 6.8

72

70.95

1.5

2

GBW01622: Ag = 2.5, As = 96, Bi = 1.2, Ga = 38, Pb 4.75, Sb = 16, Se = 18, Te = 7.5, Ti = 4.32, Zn = 14

96

95.85

2.0

3

GBW01637: Ag = 1, As= 14, Bi = 0.19, Ga = 34, In = 7.2, Pb = 3.7, Sb = 3.3, Se = 12, Sn = 8.3, Te = 31, Ti = 0.16, Zn = 13

14.00

15.96

1.2

4

GBW01622: Unalloyed steel: Ag = 0.3, As = 72, Bi = 0.5, Ca = 32, Cd = 1.9, Ga = 28, In = 0.4, Mg = 53, Pb = 2.2, Sb = 7.4, Se = 43, Sn = 0.164, Te = 0.5, Ti = 8.1, Zn = 6.8

72

70.95

1.5

5

NIES-CRM No. 18: Human urine^a

0.134 ± 0.01

0.132 ± 0.05

0.06

6

NIST^ÒSRM-1577c: Bovine liver

19.6 ± 1.4^c

19.4 ± 1.5

1.5

7

NIST-CRM: Estuarian sediments solution

10.00^d

9.99

0.5

8

NIST-SRM^®-1643c: Human hair

44.00 ± 1.72^c

43.52 ± 2.07

2

9

NIST-SRM^®-1643c: Human finger nails

125.0^c

124.8

2.5

10

SRM-NIST: Groundwater (HS Code: 382200)

1.00^e

0.99

0.5