Trivial terms

The selection of an analytical method may also be influenced by external regulatory requirements or by special requests of the customer. The following terms often appear in the analytical jargon and were compiled by Garfield [8] the classification of methods relies on purpose of the method or the administrative background. 

Official method a method required by law or by a regulation issued by an official agency (e.g. EPA, FDA, European Directives, etc.). 

Reference or standard consensus methods methods developed by organisations that use interlaboratory studies to validate them (ISO, CEN, AOAC, DIN, BSI, AFNOR etc.). Their development leads to a known and stated precision or accuracy. 

Modified method reference or standard method which has been modified to simplify or adapt it to the actual state of the art or to other types of samples. 

Rapid methods methods for the rapid determination of large number of samples. Such methods are of increasing interest in microbiology measurements. Hours or even days can be saved by reducing analytical time it increases throughput and consequently reduces cost. 

---

This trivial term, which now finds common usage, was coined as a contraction of the only sec-isoamyl structure possible, (CH3)2CHCH(CH3).2... 

The terms ortho, mefo, and para are used by chemists because they re easier to remember than numbers, and the words carry with them chemical meaning. Ortho1 shows that two groups are next to each other on the ring even though the atoms may not happen to be numbered 1 and 2. They are one example of the way in which chemists don t always use systematic nomenclature but revert to more convenient trivial terms. We consider trivial names in the next section. 

The only non-trivial term in Eq. (3) is the quantity E which is usually identified with the HMO total jc-electron energy. This can be achieved by formally setting a = 0 and P = 1 and then we speak about total ji-electron energy expressed in the units of the resonance integral p. 

The topological analysis of p(r, X) then proceeds through the search for and identification of its critical points. In the neighbourhood of a critical point, the field p(r, X) is expanded by Taylor s theorem, the first non-trivial terms being those quadratic in the variables r. The collection of the nine second derivatives of p(r, X) constitute the so-called Hessian matrix A of p(r, X) at the critical point. 

The trivial term silicones is widely used for indu.strially important siloxanes, their trivial nomenclature being given in Section 4.3.1. 

Explanations to abbreviations derived from trivial terms for ion exchange functional groups (1) Sulfo-, sulfomethyl-, sulfoethyl-, sulfopropyl-, sulfobutyl- (2) Phosphonic- (3) Carboxyl-, carboxy-methyl- (4) Trimethylaminomethyl-, Triethylaminoethyl- (5) Hydroxyethyidimethylaminomethyl- ... 

The subtraction described above is interesting, because it elimmates certain trivial terms. All contributions to 5(d>) which are independent of I>, or linear in d>, drop out from Smix- follows we shall perform a similar... 

The most frequent oligosaccharide moieties, named Solanum-has/cA by trivial terms, are branched, e.g., the trioses are linked with their inner monosaccharide unit (1—>3) to the corresponding aglycones (Fig. 7.22) ... 

Phosphatidylethanolamine (once trivially termed "cephalin") is frequently the second most abundant phospholipid class in animal and plant tissues, and... 

Hydrocarbon chains with free valences at each terminal C atom are frequently still called trimethylene-, tetramethylene-, etc. instead of alkane-l-n>-diyl groups, the systematically correct designation. Unsaturated substituent groups of this kind are named by replacing the terminal syllable. .. ene with. .. enylene. The trivial terms ethylene for -CH2-CH2-, propylene for H3C-CH-CH2-, and vinylene for -CH=CH- are still frequently... 

---