Some Useful Information Concerning the results:

The Conversion factors for the primordial nuclides are given by:

1 Bq 238U/kg = 81 ppb U (81 x 10-9 gU/g)

The 238U decay chain gammas used are:

226Ra: 186.1 keV

214Pb: 295.21 and 351.92 keV

214Bi: 609.31, 1120.29, 1764.49 and 2204.21 keV

The relationships are valid for any daughters in the 238U, 235U or 232Th chain only if the chain is in equilibrium.

1 Bq 232Th/kg = 246 ppb Th (246 x 10-9 gTh/g)

The 232Th decay chain gammas used are:

212Pb: 238.63 and 300.09 keV

208Tl: 583.19 and 2614.53 keV,

228Ac: 911.21 keV

1 Bq 40K/kg = 32300 ppb K (32300 x 10-6 gK/g)

The 40K decay chain gamma used is:

40K: 1460.83 keV

1 Bq 235U/kg = 1.76 ppm U (1.76 x 10-6 gU/g)

The 235U decay chain gammas used are:

235U: 143.76, 163.33 and 205.31 keV

The measurements of the samples below take into account the background measurements. If a measurement is below the background then the upper bound shown is the 90% confidence limit.

QBITS-CUTE Measurements:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

QBITS-CUTE G01

9.0 g

9.382

220726
220729

Jul 26, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Nb Superconducting Coax Cable with Crimp Connectors

Aug 5, 2022

(mBq/kg)

1200.00

73.79

<1721.00

<34.58

290.70

49.08

357.64

244.10

<23.75

<22.68

(ppb or ppm)

97.2 ppb

5.98 ppb

<139.4 ppb

<60.86 ppb

71.51 ppb

12.07 ppb

11.55 ppm

7.88 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<26610.00

<272.20

<13.16

24.47

66.91

(ppb or ppm)

<0.22 ppm

6.02 ppb

16.46 ppb

QBITS-CUTE G02

39.9 g

12.833

220805

Aug 5, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Stainless Steel Cables with Connectors

Aug 18, 2022

(mBq/kg)

<10.91

163.50

217.80

<7.35

103.20

13.78

112.29

67.69

<12.82

2.04

2.83

(ppb or ppm)

<0.88 ppb

13.24 ppb

17.64 ppb

<12.94 ppb

25.39 ppb

3.39 ppb

3.63 ppm

2.19 ppm

Results:

210Pb:

7Be:

54Mn

228Ac:

57Co

58Co:

(mBq/kg)

<1896.00

<58.01

<3.67

<37.24

<15.19

<6.43

(ppb or ppm)

<153.58 ppb

<9.16 ppb

QBITS-CUTE G03

Ukrvet Biopharm, Ukraine

94.0 g

6.931

251118
251123

Nov 18, 2025

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

BF-6 Glue

Nov 25, 2025

(mBq/kg)

<1.25

<44.68

<1.64

26.58

4.52

42.88

24.41

<3.72

<0.76

(ppb or ppm)

<0.1 ppb

<3.62 ppb

<2.89 ppb

6.54 ppb

1.11 ppb

1385.06 ppb

788.44 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<130.00

<32.18

<1.91

<7.55

(ppb or ppm)

<10.53 ppb

<1.86 ppb

QBITS-CUTE G04

Mini-Circuits 15542

35.5 g

10.799

260116

Jan 16, 2026

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Low Pass Filter

SLP-1.9+

Jan 27, 2026

(mBq/kg)

52.53

13.75

<200.30

<8.75

231.40

17.46

366.39

87.82

<7.06

11.65

4.38

U Waterloo Group

(ppb or ppm)

4.25 ppb

1.11 ppb

<16.22 ppb

<15.4 ppb

56.92 ppb

4.3 ppb

11834.4 ppb

2836.59 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<334.60

<82.81

<10.85

216.00

27.78

(ppb or ppm)

<27.1 ppb

53.14 ppb

6.83 ppb

In Progress and To Be Measured:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Run Numbers

Counting Dates
(if applicable)

QBITS-CUTE G05

U Waterloo Group

24.7 g

1.181

260127

Jan 27, 2026

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Copper Powder
(in the glass bottle)

(mBq/kg)

2274.00

143.60

3058.00

798.20

91.36

32.14

1890.00

143.50

7341.30

1050.00

39.51

49.39

55.460

31.970

Will likely remove copper powder from the bottle and count again

(ppb or ppm)

184.19 ppb

11.63 ppb

247.7 ppb

64.65 ppb

160.79 ppb

56.57 ppb

464.94 ppb

35.3 ppb

237123.99 ppb

33915 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

<672.60

795.52

462.80

<49.06

1707.00

215.10

(ppb or ppm)

<54.48 ppb

419.92 ppb

52.91 ppb

QBITS-CUTE G06

U Waterloo Group

28.9 g

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Glass Beads

(mBq/kg)

(ppb or ppm)

0 ppb

Err:502

0 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

(ppb or ppm)

Err:502

0 ppb

QBITS-CUTE G07

U Waterloo Group

16.0 g

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Glass Jar

(mBq/kg)

(ppb or ppm)

Err:502

0 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

(ppb or ppm)

Err:502

QBITS-CUTE G08

U Waterloo Group

1.6 g

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Carbon Black

(mBq/kg)

(ppb or ppm)

0 ppb

Err:502

0 ppb

Results:

210Pb:

7Be:

54Mn

228Ac:

(mBq/kg)

(ppb or ppm)

Err:502

0 ppb

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Next Sample

(mBq/kg)

(ppb or ppm)

Results:

210Pb:

7Be:

54Mn:

228Ac:

210Po:

(mBq)

(ppb or ppm)