Full Final report PTPGR-0364

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2
8600 112

iii

2564 6 PTPGR-0364 3
8 4
12 5 12 5 1
75

75

Assigned value; xpt WV

Scaled median absolute deviation

Standard deviation for proficiency assessment;

pt Predicted standard deviation

Horwitz equation ISO 13528, 2015

z' score |z'| 2 0

Acceptable result |z'| 20 30

Warning result |z'| 0

Unacceptable result

83 3

2564

iv

.................................................................................................................................................. iii
.........................................................................................................................................................iv

................................................................................................................................................v
...................................................................................................................................................v

.......................................................................................................................................v
..........................................................................................................................................v
1. ...................................................................................................................................................... 1
2. ............................................................................................................. 1
2.1 .......................................................................................................................... 1
2.2 Homogeneity testing ........................................................... 1
2.3 Stability testing ..................................................................................... 1

....................................................................................................... 2
4. ................................................................................................................................... 2
5. ...................................................................................................................... 2
6. ................................................................................................ 2
7. ISO 13528 2015 ........................................................................................... 3

7.1 Assigned value; xpt .................................................................. 3
7.2 Standard
deviation for proficiency assessment; pt .................................................................................... 3
7.3 u xpt ............................................................ 3
8. .......................................................................................... 4
8.1 z' score ........................................................................................ 4
8 2 ........................................................................................................... 4
9. ............................................................................................................................................ 6
9.1 ................................ 6
9.2 .......................................................................................................................... 6

......................................................................................................................................... 6
....................................................................... 7

2 ................................................ 9
3 .....................................................................11
4 ..................................................................................................................13
5 .........................................................................15

....................... 18

1 z' score v
2
3 4
4
1 z' score 5

11 5
21
22 8
31 10
10
1 12
2
3 7
4 1
5
1
61

1 19
1.

ISO IEC 17025 4 2562
1
75 8
2. 70 8
10
2.1 12 Homogeneity testing
0
2.2

ss ISO 13528 2015 pt ss
2.3 Stability testing
0 3 pt

2 2

2
ISO 13528 2015

1 2 2 19

| 1 - 2 | 0 3 pt u2 1 u2 2 2

pt -PGR-

Standard uncertainty, u 2
| 1 - 2 | 0 3 pt Interim report
u1 u
Standard
3.

8
Participant ID

4.
XX

5. WV

( No. of reported results
6. Assigned value
Laboratory result

3 19

deviation for proficiency assessment Lower limit

Upper limit Summary

report No. of reported results

Laboratory result Assigned value

Standard deviation for proficiency assessment z' score

QR Code Final report

0

7. ISO 13528 2015

7.1 ; xpt
deviation ISO 13528, 2015
Scaled median absolute
1

7.2

Standard deviation for proficiency assessment; pt

1

Predicted standard deviation Horwitz equation ISO

13528, 2015

Predicted SD R x 102 (1)

0 22c c < 1 2 x 10-7

R 0 02c0 8495 1 2 x 10-7 c 0 138 (2)
0 01c0 5 (3)
c > 0 138 (4)
03
mass fraction c

c Mean 102

Mean

7.3 u xpt

u xpt 1 25 × s p
u xpt
s
p

<0 3 pt

1 0 3 pt z' score 4 19
ISO

13528, 2015
1

WV xpt u xpt
pt 03
8. 0
8.1
z' score

z' xi - xpt (5)
pt2 u2 xpt

xi
xpt

pt

u xpt

z' score |z'| 20
20 30
Acceptable result |z'|
W Warning
Warning result

signal |z'| 0
Unacceptable result
A Action signal

82

2 z' score

31

2

| z' score | 2 2< | z' score | < 3 | z' score | 3

WV - 5 19

3 z' score 16 7

Participant ID Ethephon WV z' score
-4 36 A
64-PGR-01 Result MU 1 95
64-PGR-02 -0 21
64-PGR-03 43 80 - 0 86
64-PGR-05 48 69 - 0 57
64-PGR-07 47 02 - -1 12
64-PGR-08 47 85 -
Number of result 47 62 0 76
Mean 46 31 -
MADe
Median 6
Standard deviation 46 88
MADe Standard deviation 47.18
47 32
1 71
1.14

z' score 3.00

2.00

1.00

0.00

-1.00

-2.00

-3.00
64-PGR-01 64-PGR-08 64-PGR-03 64-PGR-07 64-PGR-05 64-PGR-02
Participant ID
1 z' score

9. 6 19
9.1
CIPAC Method: Ethephon 373
NaOH .1 - )

6 6.1)

9.2 Warning result

Unacceptable result pH meter, Auto-tritrator
Burette
- pH
pH meter
pH 4, 7 pH

NaOH

10.
Dobrat, W and A Martijn 1998 CIPAC Handbook H, Collaborative International Pesticides

Analytical Council, Harpenden, UK
ISO 13528, 2015 Statistical Methods for Use in Proficiency Testing by Interlaboratory

Comparisons ISO, Geneva, Switzerland
Sangathan, MKS 1996 Indian Standard Ethephon Technical Specifications IS 14408 ,

New Delhi, India

7 19

8 19

11

1

2
3
4
5
6
7
8

9 19

2

10 19

21 1 WV 2

1 47 71 0 47 34
2 46 53 0 47 78
3 47 38 0 47 38
4 45 97 Adequate 47 78
5 45 94 47 97
6 48 05 47 56
7 46 73 47 01
8 46 40 46 62
9 47 24 46 73
10 47 68 47 20

ss

pt

0 3 pt
ss 0 3 pt

22

1 WV
2 12

47 20 46 73
46 12 47 23
46 88 46 25

Mean 2 0 51
Mean 1 0 41
0
u 0
u1
0
| 1- 2|
Sufficient
pt

0 3 pt u2 1 u2 2

| 1 - 2 | 0 3 pt u2 1 u2 2

1

2

u1
u

11 19

3

3 12 19

Participant ID 1. - --
2. - --
64-PGR-01,
64-PGR-02, - -- -
64-PGR-03,
64-PGR-04,
64-PGR-07,
64-PGR-08

64-PGR-05,
64-PGR-06

13 19

4

14 19

4

Participant ID
64-PGR-01,
64-PGR-02,
64-PGR-03,
64-PGR-04,
64-PGR-07,
64-PGR-08
64-PGR-05,
64-PGR-06

15 19

5

16 19

51 Method number Year Participant ID
373 1998 6 -PGR-02, 6 -PGR-03,
Reference
CIPAC method 373 6 -PGR-05, 6 -PGR-08

In-house method based on 1998 6 -PGR-01, 6 -PGR-07
CIPAC method

52 Participant ID
Determination 64-PGR-01, 64-PGR-02, 64-PGR-03, 64-PGR-05,
Burette 64-PGR-08

Auto titrator 64-PGR-0

53 Participant ID
6 -PGR-07, 6 -PGR-08
Sample amount g 6 -PGR-03
0 2xxx 6 -PGR-01, 6 -PGR-02,
0 4xxx 6 -PGR-05
0 5xxx
0 6xxx

17 19

54 Participant ID

Conc of NaOH 6 -PGR-01, 6 -PGR-02, 6 -PGR-03,
solution N 6 -PGR-05, 6 -PGR-07, 6 -PGR-08
0 05 0 1

55 Participant ID

Vol of NaOH 6 -PGR-07, 6 -PGR-08
solution ml 6 -PGR-01, 6 -PGR-02, 6 -PGR-03,
>5 0 10 0 6 -PGR-05,
>10 0 15 0
>15 0 20 0

18 19

19 19

2.5

2.0

Frequency 1.5

1.0

0.5

0.0 45.20 45.90 46.59 47.29 47.99 48.69
43.80 44.50 Ethephon (%W/V)

61