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WS/T 138-1999 Workplace air. Determination of 1, 2-ethylene dichloride. Solvent desorption gas chromatographic method $180.00 via email in 1~3 business day superseded
WS/T 139-1999 Workplace air. Determination of methyl-iso-butyl ketone. Solvent desorption gas chromatographic method $180.00 via email in 1~3 business day superseded
WS/T 140-1999 Workplace air. Determination of methylisobutylketone. Desorption with heating gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 141-1999 Workplace air. Determination of total hydrocarbon except for methane. Gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 142-1999 Workplace air. Determination aniline. Solvent desorption gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 143-1999 Workplace air. Determination of methanol. Solvent desorption gas chromatographic method $220.00 via email in 1~3 business day valid
WS/T 144-1999 Workplace air. Determination of trichloroethylene. Passive sampler gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 145-1999 Workplace air. Determination of β-naphthol. High-performance liquid chromatography method $180.00 via email in 1~3 business day superseded
WS/T 146-1999 Workplace air. Determination of cypermethrin. High-performance liquid chromatography method $180.00 via email in 1~3 business day superseded
WS/T 147-1999 Workplace air. Determination of Deltamethrin. High-performance liquid chromatography method $180.00 via email in 1~3 business day superseded
WS/T 148-1999 Workplace air. Determination of p-nitroaniline. High-performance liquid chromatography method $180.00 via email in 1~3 business day valid
WS/T 149-1999 Workplace air. Determination of dibutyl phthalate and di-n-octyl phthalate. High-performance liquid chromatography method $180.00 via email in 1~3 business day superseded
WS/T 150-1999 Workplace air. Determination of formaldehyde. Polarographic method $220.00 via email in 1~3 business day superseded
WS/T 151-1999 Workplace air. Determination of benzene. Passive samping gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 152-1999 Workplace air. Determination of toluene. Passive sampling gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 153-1999 Workplace air. Determination of dimethyl benzene. Passive sampling gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 154-1999 Workplace air. Determination of 1, 2-dichloroethane. Passive sampling gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 155-1999 Workplace air - Determination of acetic ether - Passive sampling gas chromatographic method $210.00 via email in 1~3 business day valid
WS/T 156-1999 Workplace air. Determination of tetrachloroethylene. Passive sampling gas chromatographic method $220.00 via email in 1~3 business day superseded
WS/T 157-1999 Workplace air. Determination of chlorobenzene. Charcoal diffusive sampler, solvent desorption and gas chromatographic method $180.00 via email in 1~3 business day valid
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