Formaldehyde test | Stock solution ppm pH method | Textile testing

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[@farhanamanzoor5635]

Sir osam bht kmal ki vedioa ha bht helpful

[@ifranulaziz3234]

Why multifly by 0.6 & 1000

[@GhulamNabi-foodpoint]

Sir How we can preparied the caliibration curve plz make a vedio on it

[@MuhammadAli-uz2pf]

Sir G Calibirtion Curve bna dayn

[@nadirbashir777]

Why 0.6