ppb การใช้

• PPB Oil Palms buying Geodopa, NEW STRAITS TIMES-MANAGEMENT TIMES
• These effects have been demonstrated at contaminations less than 50 ppb.
• The PPB is regulatory body within the Ministry of Medical Services.
• It was 20 ppb in the prior six-month period.
• I would feel comfortable with my kids drinking 10 ppb.
• PPB Oil forecasts double-digit profit, NEW STRAITS TIMES-MANAGEMENT
• The current level of 50 ppb dates back to 1942.
• White rats develop liver cancer when exposed to 15 ppb.
• However, analyses of levels below 200 ppb TOC are still difficult.
• Its property development subsidiary, PPB Hartabina, develops mainly residential properties.
• Any reading above 124 ppb is considered a violation.
• The arsenic level is 17 ppb in that well.
• The region's peak concentration so far this year was 193 ppb.
• Clinton announced the 10 ppb standard three days before leaving office in January.
• A new, lower standard than the 50 ppb will be in place.
• Average benzene levels were 19 ppb, about four times tap water standard.
• One sample contained 55 ppb of benzene, 11 fold tap water standards.
• The threshold level for 1-butanethiol is reported as 1.4 ppb
• The meter could read values up to 140 ppb.
• The water tested over 300 ppb in 157 homes.