ph值

• Acetylene black - determination of ph value
  乙炔炭黑ph值的测定
• Standard test methods for ph measurement of water of low conductivity
  低传导率水ph值测量的试验方法
• Paper , board and pulps - determination of ph aqueous extracts
  纸张纸板的纸浆.水提取物中ph值的测定
• Visual and ph evaluations of silage
  青贮质量的目测和ph值评定
• Soil ph and other environmental influences affect blank shank
  土壤ph值和其它环境变化也影响黑胫病。
• Test method for ph of peat materials
  泥炭材料ph值的试验方法
• Standard test method for ph of soils
  土壤ph值的标准试验方法
• Determination of ph value in forest soil
  森林土壤ph值的测定
• Standard test methods for ph of water
  水ph值的标准测试方法
• Determination of ph value and acidity of starch and starch products
  淀粉和淀粉制品的ph值和酸度的测定