Headspace composition


Table 1. Headspace composition, pressure and volume of two container types, containing 10 Prunus shootlets in stage II. Type 1 consists of a Meli-jar with nick and a PP screw on lid with sample device (closure). A type 4 container consists of a Meli-jar with sampling device (body), a rubber ring and a PP-membrane pressed together with a clamp system.

Parameter

Type

time (days in culture)

1. Headspace composition

-

2

7

16

21

28

[CO2] (%)

1

0.374

0.718

1.728

2.425

1.615

4

2.022

3.738

6.787

8.149

6.58

[CO2 + Ar] (%)

1

22.11

21.98

21.05

20.56

21.93

4

19.49

14.83

8.376

4.318

6.471

[N2] (%)

1

77.52

77.30

77.22

77.02

77.30

4

78.14

81.43

84.84

87.53

86.95

[Ethylene] (ppm)

1

0.134

0.159

0.104

0.135

0.131

4

0.440

0.674

1.10

2.14

1.32

2. Pressure (Pa)

Atm.

102906

102325

102858

103458

103092

1

102906

102325

102858

103458

103092

4

101906

100649

98710

98748

98648

3. Container volume (ml)

1

282

282

282

282

282

4

281

272

265

265

264