Laboratory sample
Sample or subsample(s) sent to or received by
the laboratory. |
實驗樣品
實驗室所獲得之試樣． |
Lag phase
Period which may precede commencement of
rapid degradation of a pesticide by a microbial
population. It is the period needed either for
induction of microbial enzymes or for growth of
the microbial population to adequate size. See
also enhanced degradation, (after US-EPA,
1992) |
延滯期
農藥在田微生物快速降解前微生物之酵素
活性經誘發或增殖至適芽之族群密度所需的
時間。 |
LC50
See median lethal concentration. |
半數致死濃度 |
LD50
Ses median lethai dose. |
半數致死劑量 |
Leaching
Process by which a pesticide moves downward
through the soil profile in the aqueous phase. |
浸出
農藥在土壤三水層中呵下移動的現象。 |
Leachate
Aqueous phase percolating through a soil
profile or a soil column. |
浸出液
由土壤中浸運出之水。 |
Limit of detection (LOD)
Lowest concentration of a pesticide residue in a
defined matrix where positive identification can
be achieved using a specified method. |
檢測極限
以特定檢測方法可確實鑑定出基質中農藥殘
留量之最低濃度。 |
Limit of quantitation(LOQ)
Lowest concentration of a pesticide residue in a
defined matrix where positive identification and
quantitative measurement can be achieved using
a specified method. The term limit of
quantitation is preferred to limit of
determination to differentiate it from LOD.
LOQ has been defined as 3 times the LOD
(Keith, 1991) or as 50% above the lowest
fortification level used to validate the method
(US-EPA, 1996). |
計量極限
以特定檢測方法可確實分析定量基質中農藥
殘留量之最低農度。計量極限被定義為檢測
極限之3倍或最低添加置之50%。 |
Limit of reporting
Practical limit of residue quantitation at or
above the LOQ. The limit of quantitation for a
defined matrix and method may vary between
laboratories or within the one laboratory from
time to time because of different equipment,
techniques and regents. |
報告極限
在計量極限以上之農藥殘留實測值。實驗室
間或同一實驗室不同時間所完成之檢測可能
因為儀器設備、分析技術和試劑等之差異，
其計量極限可能不同。 |
Lipophilicity
Affinity for fat as described by partitioning
behaviour between water and an immiscible
organic solvent, favouring the latter, and which
correlates with bioconcentraiion. See also
octanol water partition coefficient, (after
Duffus, 1993) |
親脂性
物質對脂類之親和性。常以其在水與有機溶
媒間之分佈性質加以描述．此性質與生物濃
縮有關。 |
Lot
Quantity of material which is assumed to be
single population for sampling purposes. See
also batch. |
批樣
為同一目的而取樣所得得某一數量之試料。 |
Lysimeter
Device for measuring leaching losses from a
column or block of soil. The simplest lysimeters
may be devices for sampling a portion of the
water leaching through a natural sediment or
soil (e.g. suction lysimeter), whereas more
elaborate lysimelers may involve the
confinement of an entire segment of soil from
which all Ieachate is collected (e.g. monolithic
lysimeter). |
滲漏測定計
為測試農藥在土壤中浸出現象所設置之裝
置。簡易型者如吸引型滲漏測定計，取得部
份之浸出液，另如較精密之整體型滲漏測定
計，可收集所有的浸出物。 |
