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...?? ???????????PPM? ??PPM?????????? ????????????????????????????????????????????????????%????????PPM????????????????500 PPM???250 PPM????????????????? ......
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ppm?ppb?ppt?????????_????
...ppm?ppb?ppt????????????????????? ????????????? 1. ppm?parts per million?????????????????????????????????? 1 ppm???????????????1??????...
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ppm????????????mg/L? - ??
...ppm????????????????????????????20?ppm????? ?????????????? ??? ppm???????????????????????? dppm dppm????????? ???????????...
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????ppm?????? - ??
...PPM????????????????????????????????????????...
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??????PPM????????_????
...??0.001%???????????????????????????????PPM???????????????????PPM??? PPM??????????????????????? ????????????????????????...
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ppm?????,?????????500ppm???????
...PPM????Parts Per Million????????????1%???100??????1PPM???100?????????????????????????????????? ????????????500ppm????????100??????????????????500???????????????? ......
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ppm?????g/m3??mg/L?_????
...ppm?????????????????????????????????????? ????????????ppm??????????????? 4. ppm???????? ppm?????????????? ????????????? - 1ppm = 1mg/L - 1ppm ......
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???????PPM?????? - ??
...PPM?Parts Per Million?????????????????????????????????? ??PPM?????????????? ??????????????????PPM????????? ???0.0001%????PPM????100 PPM????????????...
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????????PPM???????_????
...?????PPM? PPM?????????????????????????? ?????????????????????????????100????????????????? PPM???????????????PPM????????????????...
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ppm????????????????ppm?_????
...ppm????????????????ppm?PPM????????????????ppm?PPM???parts per million???????????????????????????????????????????????...
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