Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
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1stepanova t a english for chemists
| Scction II
Упр. 1. Назовите значения следующих интернациональных слов: modem, instrumental, calorimetry, spcctromctry, effect, spcctrography, diffraction, radiometric, polarography, modification, instrument, jnicroanalysis, macroanalysis, perspective, scalc, fortune Упр. 2. Проверьте, помните ли вы значения следующих слов; если ист, обратитесь к словарю: by no means, supersede, supplement, supplant, wet, fluorimetry, continuous, size, sample, trace, team, wheel Text 33 В Modern Methods of Analysis Прочтите следующий текст про себя (контрольное время чтения — 3 минуты). The so-called classical gravimetric and volumetric methods have by no means been superseded by physical chcmistry and physical methods. Unlikely as such a statement may seem, instrumental analysis, as it is known today, supplements rather than supplants the so-callcd classical wet methods. Such terms as calorimetry, spectrophotometry, Raman effcct, fluorimetry', spcctrography, X-ray diffraction, radiomctric methods, polarography, ctc., arc in common usage and every part o f the analytical work now performed is through the use of instrumentation. Indeed, . modifications o f many o f these instruments arc now being moved out into actual manufacturing operations in order to provide continuous analysis. One of the more modem developments in the field of analysis is that o f microanalysis, employed where the size of the samples is considerably smaller than used in the type o f analysis sometimes defined as macroanalysis. Today quite a number of analysts arc dircctly conccmcd with what is frequently defined as trace analysis. The determination of very low concentrations is often o f great importance in maintaining high quality of a product. A wide variety of new techniques have been developed to meet this need. Another field currently receiving greater attention is the matter of scientific sampling. Certainly, no method of analysis, accuratc as it may be, will give a proper perspective if the sample employed is not reasonably representative of the whole. Today the research analyst in the chcmical proccss industries is an honoured member o f the “team”. The use o f this term has bccomc widespread to describe the modem “team approach” to the discovery, development, and full-scale production of new products. Thus, the wheel of fortune for the analyst has made a complete circlc. 217 Упр. 3. Передайте основное содержание текста в нескольких пред ложениях. Упр. 4. Какие слова в тексте означают «быть непосредственно свя занным с...»? Упр. 5. Найдите в тексте ответы на следующие вопросы: 1. What is the position of instrumental analysis in analytical chcmistry? 2. What is the purpose of modifying instruments? 3. What is the diffcrcncc between macroanalysis, microanalysis and trace analysis? 4. What requirements should the sample meet to allow the analyst to obtain proper results? 5. What is the position of the research analyst in industry or organization at present? Упр. б. Закончите следующие предложения: 1. Gravimetric and volumctric methods... 2. The use o f instru mentation.. . 3. A wide variety of new tcchniqucs have been developed... 4. A sample employed must be... 5. Now the research analyst in the chcmical process industries... жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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