MASS AND CONCENTRATION m mass volume M units: L3 note:M mass,L length,T time,H heat
MASS AND CONCENTRATION c = m V m = mass V = volume note: M = mass, L = length, T = time, H = heat M units: L3
MASS →AMOUNT OF SUGAR CONCENTRATIONSWEETNESS
MASS AMOUNT OF SUGAR CONCENTRATION SWEETNESS
CONCENTRATION UNITS g,0上、 g g m3 0鸿 m3 g g 3 g =1 ppm m3 106cm3 100 mg g ppm
CONCENTRATION UNITS g 103 mg g m3 L m3 103 g m3 m3 106 cm3 g 106 g 1 ppm mg L g m3 ppm mg L g m3 g cm3 1
1 teaspoon Salt≥20ppt Sugar≥20ppm Phosphorus≥20ppb
1 teaspoon Salt 20 ppt Sugar 20 ppm Phosphorus 20 ppb
TYPICAL UNITS FOR WATER-QUALITY CONSTITUENTS 0.1<c<100 10,000ug/L>0mg/L Variables Units total dissolved solids,salinity gL→kg/m3→ppt oxygen,BOD,nitrogen mgL→g/m3→ppm phosphorus,chlorophyll a,toxics gL→mg/m3+→ppb toxics ng/L→ug/m3→pptr
Variables Units total dissolved solids, salinity g/L kg/m3 ppt oxygen, BOD, nitrogen mg/L g/m3 ppm phosphorus, chlorophyll a, toxics g/L mg/m3 ppb toxics ng/L g/m3 pptr TYPICAL UNITS FOR WATER-QUALITY CONSTITUENTS 0.1 < c < 100 10,000 g/L 10 mg/L