Kita kerap bingung ketika mencari standar mutu air untuk kebutuhan laboratorium. Kami sajikan standar mutu air kebutuhan laboratorium dengan mengacu kepada standar ASTM dan ISO.
1. Standard Specification for Reagent Water
(laboratory water quality standard)
Dengan mengacu kepada standar ASTM D1193-91 dan ISO 3696 , kita dapat memenuhi kebutuhan tsb
dengan teknologi pemurnian sistem membran.
Pada lembar berikut, disajikan standar air untuk reagent (reagent water) dengan mengacu
kepada standar ASTM dan ISO.
Disajikan oleh :
Imam rozali
2.
3. Parameter Grade 1 Grade 2 Grade 3
Conductivity µS/cm (temp corrected) < 0.1 < 1 < 5
pH at 25°C N/A N/A 5.0 - 7.0
Oxidizable matter Oxygen (02)
content mg/L
N/A < 0.08 < 0.4
Absorbance at 254 nm and 1 cm
optical path length, absorbance units
< 0.001 < 0.01 N/A
Residue after evaporation on heating
at 110°C mg/kg
N/A < 1 < 2
Silica (Si02) mg/L < 0.01 < 0.02 < N/A
ISO 3696 Standard
This standard was last reviewed* in 2011
Specifies the requirements for three grades for the analysis of inorganic chemicals. Not
applicable to organic trace analysis, analysis of surface-active agents and biological or
medical analysis. The material shall be a clear, colourless liquid as assessed by
inspection. Classifies according to the content: free from dissolved or colloidal ionic
and organic contaminants, very low inorganic, organic or colloidal contaminants and
suitable for laboratory wet chemistry work. Specifies the pH and conductivity
measurement, the limit tests for oxidizable matter and for reactive silica, the
measurement of absorbance and the determination of residue after evaporation at
110 °C.
ISO: International Organization for Standardization