case 0: string="Ozone"; break; case 1: string="Water Vapour"; break; case 2: string="Methane"; break; case 3: string="Carbon Dioxide"; break; case 4: string="Carbon Monoxide"; break; case 5: string="Nitrogen Dioxide"; break; case 6: string="Nitrous Oxide"; break; case 7: string="Formaldehyde"; break; case 8: string="Sulphur Dioxide"; break; case 9: string="Ammonia"; break; case 10: string="Ammonium"; break; case 11: string="Nitrogen Monoxide"; break; case 12: string="Atomic Oxygen"; break; case 13: string="Nitrate Radical"; break; case 14: string="Hydroperoxyl Radical"; break; case 15: string="Dinitrogen Pentoxide"; break; case 16: string="Nitrous Acid"; break; case 17: string="Nitric Acid"; break; case 18: string="Peroxynitric Acid"; break; case 19: string="Hydrogen Peroxide"; break; case 20: string="Molecular Hydrogen"; break; case 21: string="Atomic Nitrogen"; break; case 22: string="Sulphate"; break; case 23: string="Radon"; break; case 24: string="Elemental Mercury"; break; case 25: string="Divalent Mercury"; break; case 26: string="Atomic Chlorine"; break; case 27: string="Chlorine Monoxide"; break; case 28: string="Dichlorine Peroxide"; break; case 29: string="Hypochlorous Acid"; break; case 30: string="Chlorine Nitrate"; break; case 31: string="Chlorine Dioxide"; break; case 32: string="Atomic Bromide"; break; case 33: string="Bromine Monoxide"; break; case 34: string="Bromine Chloride"; break; case 35: string="Hydrogen Bromide"; break; case 36: string="Hypobromous Acid"; break; case 37: string="Bromine Nitrate"; break; case 38: string="Oxygen"; break; case 10000: string="Hydroxyl Radical"; break; case 10001: string="Methyl Peroxy Radical"; break; case 10002: string="Methyl Hydroperoxide"; break; case 10003: string="Reserved"; break; case 10004: string="Methanol"; break; case 10005: string="Formic Acid"; break; case 10006: string="Hydrogen Cyanide"; break; case 10007: string="Aceto Nitrile"; break; case 10008: string="Ethane"; break; case 10009: string="Ethene (= Ethylene)"; break; case 10010: string="Ethyne (= Acetylene)"; break; case 10011: string="Ethanol"; break; case 10012: string="Acetic Acid"; break; case 10013: string="Peroxyacetyl Nitrate"; break; case 10014: string="Propane"; break; case 10015: string="Propene"; break; case 10016: string="Butanes"; break; case 10017: string="Isoprene"; break; case 10018: string="Alpha Pinene"; break; case 10019: string="Beta Pinene"; break; case 10020: string="Limonene"; break; case 10021: string="Benzene"; break; case 10022: string="Toluene"; break; case 10023: string="Xylene"; break; case 10500: string="Dimethyl Sulphide"; break; case 20001: string="Hydrogen Chloride"; break; case 20002: string="CFC-11"; break; case 20003: string="CFC-12"; break; case 20004: string="CFC-113"; break; case 20005: string="CFC-113a"; break; case 20006: string="CFC-114"; break; case 20007: string="CFC-115"; break; case 20008: string="HCFC-22"; break; case 20009: string="HCFC-141b"; break; case 20010: string="HCFC-142b"; break; case 20011: string="Halon-1202"; break; case 20012: string="Halon-1211"; break; case 20013: string="Halon-1301"; break; case 20014: string="Halon-2402"; break; case 20015: string="Methyl Chloride (HCC-40)"; break; case 20016: string="Carbon Tetrachloride (HCC-10)"; break; case 20017: string="HCC-140a"; break; case 20018: string="Methyl Bromide (HBC-40B1)"; break; case 20019: string="Hexachlorocyclohexane (HCH)"; break; case 20020: string="Alpha Hexachlorocyclohexane"; break; case 20021: string="Hexachlorobiphenyl (PCB-153)"; break; case 30000: string="Radioactive Pollutant (Tracer, defined by originating centre)"; break; case 60000: string="HOx Radical (OH+HO2)"; break; case 60001: string="Total Inorganic and Organic Peroxy Radicals (HO2+RO2)"; break; case 60002: string="Passive Ozone"; break; case 60003: string="NOx Expressed As Nitrogen"; break; case 60004: string="All Nitrogen Oxides (NOy) Expressed As Nitrogen"; break; case 60005: string="Total Inorganic Chlorine"; break; case 60006: string="Total Inorganic Bromine"; break; case 60007: string="Total Inorganic Chlorine Except HCl, ClONO2: ClOx"; break; case 60008: string="Total Inorganic Bromine Except Hbr, BrONO2:BrOx"; break; case 60009: string="Lumped Alkanes"; break; case 60010: string="Lumped Alkenes"; break; case 60011: string="Lumped Aromatic Coumpounds"; break; case 60012: string="Lumped Terpenes"; break; case 60013: string="Non-Methane Volatile Organic Compounds Expressed as Carbon"; break; case 60014: string="Anthropogenic Non-Methane Volatile Organic Compounds Expressed as Carbon"; break; case 60015: string="Biogenic Non-Methane Volatile Organic Compounds Expressed as Carbon"; break; case 60016: string="Lumped Oxygenated Hydrocarbons"; break; case 62000: string="Total Aerosol"; break; case 62001: string="Dust Dry"; break; case 62002: string="water In Ambient"; break; case 62003: string="Ammonium Dry"; break; case 62004: string="Nitrate Dry"; break; case 62005: string="Nitric Acid Trihydrate"; break; case 62006: string="Sulphate Dry"; break; case 62007: string="Mercury Dry"; break; case 62008: string="Sea Salt Dry"; break; case 62009: string="Black Carbon Dry"; break; case 62010: string="Particulate Organic Matter Dry"; break; case 62011: string="Primary Particulate Organic Matter Dry"; break; case 62012: string="Secondary Particulate Organic Matter Dry"; break; case 62013: string="Black carbon hydrophilic dry"; break; case 62014: string="Black carbon hydrophobic dry"; break; case 62015: string="Particulate organic matter hydrophilic dry"; break; case 62016: string="Particulate organic matter hydrophobic dry"; break; case 62017: string="Nitrate hydrophilic dry"; break; case 62018: string="Nitrate hydrophobic dry"; break; case 62019: string="Reserved"; break; case 62020: string="Smoke - high absorption"; break; case 62021: string="Smoke - low absorption"; break; case 62022: string="Aerosol - high absorption"; break; case 62023: string="Aerosol - low absorption"; break; case 62024: string="Reserved"; break; case 62025: string="Volcanic ash"; break; case 65535: string="Missing"; break;