Review of chemical storage and handling protocols in the Environmental Radioactivity laboratories of



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Appendix 4 Testing of currently held time-sensitive chemicals


Table A4.1 Details of pH testing of chloroform

pH testing of Chloroform

Date: 29/10/08

Analysts: PSM / JS



















Location

Storage

pH










Chem Lab (L.19)

2.5L Opened Winchester

7




























Method:
















10-20ml of chloroform was poured into a petri-dish and tested with a pH strip (1-14 range).



















Results:
















Strip indicated a pH of 7 (neutral) which would indicate that there hasn’t been any




formation of Hydrochloric Acid within the chloroform, therefore no phosgene would be expected.



















Table A4.2 Details of phosgene testing of chloroform

Phosgene Testing in Chloroform

Date: 29/10/08

Analysts: PSM / JS













Test Bottle: 1

Location

Storage







Chem Lab (L.19)

2.5L Opened Winchester







Method:










Prepared a 25ml alcoholic solution containing a 10% mixture of Dimethylaminobenzaldehyde

& Diphenylamine. This solution was dripped onto white strips of paper and allowed to dry

completely. From this 2 strips were fixed onto the neck of the Chloroform Bottle along with a

Plastic Bag containg the strips and Bottle Cap which was then removed to ensure all gas

was trapped within the bag and exposed to the strips. Strips were left for 1minute before

checking results.










Results:









The strip did not change colour, indicating no phosgene present within this Chloroform bottle.


Test Bottle: 2

Location

Storage







Chem Lab (L.19)

2.5L Unopened Winchester







Method:










Prepared a 25 ml alcoholic solution containing a 10% mixture of Dimethylaminobenzaldehyde

& Diphenylamine. This solution was dripped onto white strips of paper and allowed to dry

completely. From this a Test Strip was fixed to the inside of the Chloroform Bottle lid and was

placed onto the Chloroform Bottle for 1minute.







Results:










The strip did not change colour, indicating no phosgene present within this Chloroform bottle.

Table A4.3 Peroxide testing of Isopropanol in EnRad laboratories and work areas

Peroxide Testing of Isopropanol

























Location

Storage

Peroxides Present (mg/L)

Hydro-Peroxides Present (mg/L)

Comments

Chem Lab (L.19)

500 mL Squirt Bottle

0

0

Slight blue colour around edge of strip.
















Chem Lab (L.21)

500 mL Squirt Bottle

0

0



















Chem Lab (L.19)

2.5 L (Unopened Winchester)

0

0

Possibly a little bit of blue around strip edges
















Detecter Room (L.29)

500 mL Squirt Bottle

2

2

Maybe a slight increase in Hydro-peroxide Test.
















Source Lab (L.25)

500 mL Squirt Bottle

0.5

0



















Source Lab (L.25)

2.5 L Opened Winchester

0

0

Possibly a little bit of blue around strip edges
















Method:













10–20 ml of each solution was poured into a labelled petri-dish and tested with Quantofix Peroxide 25 Test Strips (Sigma Aldrich) according to pack instructions.


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