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Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
Sampling for sulphuric acid mist version for slideshare
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Sampling for sulphuric acid mist version for slideshare

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Discussion of options available for sampling for sulphuric acid mist in the workplace. …

Discussion of options available for sampling for sulphuric acid mist in the workplace.

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  • i'm very happy to find this document because,many informations in site,will help me for to omplimate the acid mist sampling program.
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  • 1. Mike Slater
  • 2. This Slideshare version of thepresentation includes someadditional explanatory text notincluded on the original slides
  • 3. Recognition Evaluation Control
  • 4. Recognition Evaluation ControlOccupational hygiene is about preventing illhealth at work
  • 5. Recognition Evaluation ControlMeasuring exposure to hazardoussubstances can be an important part of thatprocess
  • 6. A new Workplace Exposure Limit (WEL) hasrecently been introduced for sulphuric acid mist
  • 7. It’s the first limit to be specified as the thoracicfraction
  • 8. The “thoracic fraction” includes those particles that can deposit in the regions of the respiratory system coloured blue and pink on this diagramImage Source: http://www.skcinc.com
  • 9. Criteria for selecting a suitablemethod:
  • 10. Criteria for selecting a suitablemethod: Specificity 
  • 11. Criteria for selecting a suitablemethod: Specificity  No interferences from other compounds that may be present
  • 12. Criteria for selecting a suitablemethod: Specificity  Sensitivity 
  • 13. Criteria for selecting a suitablemethod: Specificity  Sensitivity  preferably can detect concentrations as low as 1/10th of the WEL (i.e. 0.005mg/m3)
  • 14. Criteria for selecting a suitablemethod: Specificity  Sensitivity  Thoracic fraction 
  • 15. Criteria for selecting a suitablemethod: Specificity  Sensitivity  Thoracic fraction  Personal sampling 
  • 16. BS ISO 21438-1: 2007 Workplace atmospheres – Determination of inorganic acids by ion chromatography, part 1: Non-volatile acids (sulphuric acid and phosphoric acid)
  • 17. BS ISO 21438-1: 2007 Workplace atmospheres – Determination of inorganic acids by ion chromatography, part 1: Non-volatile acids (sulphuric acid and phosphoric acid) The method commonly used in the UK
  • 18. BS ISO 21438-1: 2007 Workplace atmospheres – Determination of inorganic acids by ion chromatography, part 1: Non-volatile acids (sulphuric acid and phosphoric acid) This collects the inhalable fraction
  • 19. Source:www.tsi.com
  • 20. ParticulatesInhalable Thoracic Respirable
  • 21. Particulates Inhalable Thoracic RespirableLets look at the methods used to collectthe different fractions
  • 22. ParticulatesInhalable Thoracic Respirable
  • 23. Inhalable Fraction 7 hole head IOM head Filter cassette Operate at 2 litres/minute
  • 24. I.O.M sampler The common sampler used in the UK
  • 25. BS ISO 21438-1: 2007 Workplace atmospheres – Determination of inorganic acids by ion chromatography, part 1: Non-volatile acids (sulphuric acid and phosphoric acid) Collects the inhalable fraction
  • 26. ParticulatesInhalable Thoracic Respirable
  • 27. Respirable Fraction The cyclone samplerSource: http://www.skcinc.com
  • 28. ParticulatesInhalable Thoracic Respirable
  • 29. Thoracic Fraction
  • 30. Thoracic Fraction A universal method has not been established
  • 31. Thoracic Fraction So let’s look at some possible options
  • 32. Respirable - Thoracic CyclonesThis sampler is usedfor oil mist in the USASource: www.bgiusa.com/ihi/hfrtc.htm
  • 33. Parallel Particle Impactor Size-selective Samplers for Thoracic or Respirable ParticulatesSource: http://www.skcinc.com/prod/225-380.asp
  • 34. So what are the options forsampling sulphuric acid mist?
  • 35. Criteria for selecting a suitablemethod: Specificity  Sensitivity  Thoracic fraction  Personal sampling 
  • 36. Nyrstar method Staplex Model TFIA-2F high volume sampler with 4-inch diameter filter
  • 37. Nyrstar method Not personal sampling
  • 38. Nyrstar method Not thoracic fraction
  • 39. Nyrstar method Specificity  Sensitivity  Thoracic fraction  Personal sampling 
  • 40. Source:www.tsi.com
  • 41. Option 1 Sample for inhalable fraction
  • 42. BS ISO 21438-1: 2007 Specificity  Sensitivity  Thoracic fraction  Personal sampling 
  • 43. BS ISO 21438-1: 2007 Specificity  TheSensitivity with interferences can be problems overcome  Thoracic fraction  Personal sampling 
  • 44. Option 1 Sample for inhalable fraction This approach will overestimate the thoracic fraction
  • 45. Option 1 Sample for inhalable fraction But if results lower than 0.05 mg/m3, then the thoracic concentration will be well below the limit
  • 46. Option 1 Sample for inhalable fraction If results substantially higher than 0.05 mg/m3, then it is likely that the limit will be exceeded
  • 47. Option 1 Sample for inhalable fraction But results will be difficult to interpret if they are just above 0.05 mg/m3
  • 48. Option 2 Develop and validate a method for the thoracic fraction of sulphuric acid mist
  • 49. Option 2 Develop and validate a method for the thoracic fraction of sulphuric acid mist Method development and validation will be expensive
  • 50. Option 2 Develop and validate a method for the thoracic fraction of sulphuric acid mist I think it is unlikely that HSE will fund this
  • 51. Other important considerations Correcting for background sulphate Sampling strategy Interpreting results
  • 52. mike@diamondenv.co.ukwww.diamondenv.co.ukhttp://diamondenv.wordpress.comwww.slideshare.net/mikeslaterTwitter @diamondenvMike Slater
  • 53. Mike Slater, Diamond Environmental Ltd. (mike@diamondenv.co.uk) This presentation is distributed under the Creative Commons Attribution-NonCommercial-ShareAlike UK:International Licence

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