±±¾©Ê¯ÓÍ»¯¹¤Ñ§Ôº2026ÄêÑо¿ÉúÕÐÉú½ÓÊÕµ÷¼Á¹«¸æ
²é¿´: 604  |  »Ø¸´: 1
±¾Ìû²úÉú 1 ¸ö ·­ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴

sweet050708

Òø³æ (СÓÐÃûÆø)

[ÇóÖú] ·­ÒëÓ¢ÎÄÕªÒª лл£¡

This paper presents an approach that may be applied as an accurate and rapid tool for classifying
coffee beans on the basis of the specific kahweol content. Using Fourier-transform Raman spectroscopy
with 1064 nm excitation it is possible to monitor the characteristic Raman bands of kahweol in green
coffee beans without chemical and physical processing of the beans. The procedure was optimized on
the basis of 83 and 125 measurements of whole and ground beans, respectively, using coffee samples
of two different species, Coffea arabica L. and Coffea canephora L. (var. Robusta), and different origins
(Asia, Africa, and South America). The relative contribution of the kahweol in individual beans can be
determined quantitatively by means of a component analysis of the spectra, yielding a spectral kahweol
index (¦Òka) that is proportional to the relative content of kahweol in a coffee bean. The reproducibility of
the spectroscopic measurement and analysis was found to be 3.5%. Individual beans of the same type
and origin reveal a scattering of the ¦Òka values. Nevertheless, an unambiguous distinction between
Arabica and Robusta samples is possible on the basis of single-bean measurements as the ¦Òka values
are greater than and less than 10 for Arabica and Robusta coffees, respectively. Measurements of
whole and ground beans afforded very similar results, despite the heterogeneous distribution of kahweol
within a bean. Unlike conventional analytical techniques, the single-bean sensitivity of the present
approach may also allow for a rapid detection of unwanted admixtures of low-value Robusta coffee to
high-quality and more expensive Arabica coffee.

» ²ÂÄãϲ»¶

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

À­ºäµÄɧÄê¦Ð

гæ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
sweet050708: ½ð±Ò+25, ·­ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2013-04-03 12:53:03
ÕªÒª£ºÕâÆªÂÛÎÄÖ÷ÒªÌṩÁËÒ»ÖÖ׼ȷ¶ø¿ìËٵĸù¾Ý¾ßÌå¿§·È¶¹´¼Æ·ÖÊÇø·Ö¿§·È¶¹µÄ·½·¨¡£Í¨¹ýʹÓÃ1064nm¸µÀïÒ¶±ä»»À­Âü¹âÆ×½øÐÐÓ¦¼¤´¦Àí£¬¿ÉÒÔ¼à²âµ½ÂÌÉ«¿§·È¶¹ÀïµÄ¿§·È¶¹´¼µÄÀ­ÂüÆ×´øÌØÕ÷¶ø¿§·È¶¹±¾Éí²»»á·¢Éú»¯Ñ§»òÎïÀí·´Ó¦¡£ÎªÈ·±£Õû¸ö¹ý³ÌµÄÎó²î×îС£¬·Ö±ðʹÓÃÁË83¸öµ¥Î»µÄÍêÕû¿§·È¶¹ºÍ125¸öµ¥Î»Ä¥ËéµÄ¿§·È¶¹£¬²¢ÇÒʹÓÃÁËÁ½ÖÖ¿§·È¶¼ÑùÆ·£¬°¢À­²®¿§·ÈLºÍÖÐÁ£ÖÖ¿§·ÈL.£¨±äÖÖÂÞ°Í˹Ëþ£©£¬ÒÔ¼°²»Í¬ÇøÓòµÄ¿§·È£¨ÑÇÖÞ£¬·ÇÖÞ£¬ºÍÄÏÃÀ¹ú£©¡£Ã¿Ò»¸ö¿§·È¶¹µÄ¿§·È¶¹´¼ÔÚÊýÁ¿ÉÏ¿ÉÒÔͨ¹ý¹âÆ×µÄ³É·Ý·ÖÎö»ñµÃ£¬¶øËùµÃµ½µÄ¿§·È¶¹´¼¹âÆ×Ö¸Êýͬ¿§·È¶¹ÖеĿ§·È¶¹´¼³ÉÕý±ÈÀý¹ØÏµµÄ¡£¹âÆ×²âÁ¿ºÍ¹âÆ×·ÖÎöµÄÖØÏÖÐÔ±»È·ÈÏΪ3.5%¡£Í¬Ò»µØÇøµÄͬһÖÖÀàµÄ²»Í¬¿§·È¶¹µÄ¿§·È¶¹´¼¹âÆ×Ö¸ÊýÖµ±È½Ï·ÖÉ¢¡£È»¶ø£¬°¢À­±È¿¨ºÍÂÞ°Í˹Ëþ¿§·ÈÑùÆ·Ö®¼ä´æÔÚÒ»¸öÄ£ºýµÄ²î±ð£¬¼´¾Íµ¥¸ö¿§·È¶¹µÄ¿§·È¶¹´¼¹âÆ×Ö¸Êý¶øÑÔ£¬°¢À­±È¿¨¿§·ÈµÄ¿§·È¶¹´¼¹âÆ×Ö¸ÊýÒª´óÓÚ10£¬¶øÂÞ°Í˹Ëþ¿§·ÈµÄ¿§·È¶¹´¼¹âÆ×Ö¸ÊýҪСÓÚ10¡£ÕûÌå²âÁ¿ºÍÄ¥Ëé²âÁ¿µÄµÄ¿§·È¶¹µÄ¼ì²â½á¹ûºÜÏàËÆ£¬¾¡¹ÜÒ»¸ö¿§·È¶¹Àï·Ö²¼Óв»Í¬ÖÖÀàµÄ¿§·È¶¹´¼¡£Ó봫ͳµÄ·ÖÎö·½·¨²»Í¬£¬±¾Ñо¿ÖÐÌáµ½µÄµ¥¶¹Ãô¸Ð¶È·ÖÎö·½·¨¿ÉÒÔ¿ìËٵĴӻìºÏÓÐ¸ßÆ·Öʺ͸ü°º¹óµÄ°¢À­±È¿¨¿§·ÈÖÐÇø±ð³öµÍ¸½¼ÓÖµµÄÂÞ²¼Ë¹Ëþ¿§·È¡£
À³ÎÄÒ½ÁÆÍø-¡°Ò»Õ¾Ê½¡±Ò½ÎÀ×ÛºÏÐÅÏ¢·þÎñƽ̨£¬½¡¿µ×ÊѶ£¬Ò½ÁÆÎÄÏ×£¬Ò½Ñ§¿Î¼þ£¬Ò½Ñ§ÊÓÆµ£¬Ò½Ñ§²âÊÔ£¡²»À´ÊÇÄãµÄËðÉË£¡
2Â¥2013-04-02 18:05:31
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ sweet050708 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ²ÄÁÏר˶283Çóµ÷¼Á +14 ÊÔÊÔ¿´ß 2026-04-04 15/750 2026-04-05 19:21 by jkddd
[¿¼ÑÐ] 315Çóµ÷¼Á +13 ÐÀϲ777 2026-04-04 14/700 2026-04-05 18:48 by liuying2007
[¿¼ÑÐ] 285Çóµ÷¼Á +11 ŶßϺôo 2026-04-04 11/550 2026-04-05 17:59 by Öí»á·É
[¿¼ÑÐ] 298Çóµ÷¼Á +7 manman511 2026-04-05 7/350 2026-04-05 10:29 by ÌÆãå¶ù
[¿¼ÑÐ] 0854Çóµ÷¼Á +4 assdll 2026-04-04 4/200 2026-04-05 09:44 by zhq0425
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +12 Ò»ÑùYWY 2026-04-04 12/600 2026-04-05 08:24 by 544594351
[¿¼ÑÐ] ¿¼Ñе÷¼Á +11 СsunÒªºÃÔË 2026-04-04 11/550 2026-04-05 08:02 by qlm5820
[¿¼ÑÐ] 344²ÄÁÏÓ뻯¹¤µ÷¼Á +9 µ÷¼ÁÉϰ¶«^ 2026-04-03 9/450 2026-04-04 23:10 by happyddm
[¿¼ÑÐ] 292·Ö£¬²ÄÁÏÓ뻯¹¤£¬ÉêÇëµ÷¼Á +22 ³ÌÇçÖ® 2026-04-01 26/1300 2026-04-04 22:03 by hemengdong
[¿¼ÑÐ] Ò»Ö¾Ô¸ÉϺ£´óѧÉúÎïѧ346 +3 ÉϺ£´óѧ346µ÷¼Á 2026-04-03 3/150 2026-04-04 20:20 by dongzh2009
[¿¼ÑÐ] 319Çóµ÷¼Á +4 ÐÇÐDz»Õ£ÑÛà¶ 2026-04-03 4/200 2026-04-04 16:25 by ÖзÉÔº¿Õ¹ÜѧԺÑ
[¿¼ÑÐ] 309Çóµ÷¼Á +4 ¿ìÀÖµÄС°×¸ë 2026-04-04 5/250 2026-04-04 15:55 by cql1109
[¿¼ÑÐ] 297Çóµ÷¼Á +11 ljy20040718£¡ 2026-04-03 13/650 2026-04-04 09:23 by À´¿´Á÷ÐÇÓê10
[¿¼ÑÐ] ²ÄÁÏ¿ÆÑ§Ó빤³Ì339Çóµ÷¼Á +12 hyz0119 2026-03-31 13/650 2026-04-03 18:33 by lsÁõ˧
[¿¼ÑÐ] Ò»Ö¾Ô¸Äϲý´óѧ324Çóµ÷¼Á +13 hanamiko 2026-04-01 13/650 2026-04-03 18:30 by lsÁõ˧
[¿¼ÑÐ] 071000ÉúÎïѧµ÷¼Á +8 ÖªÕÑÂû 2026-04-02 8/400 2026-04-03 10:36 by macy2011
[¿¼ÑÐ] 262Çóµ÷¼Á +6 ÀøÖ¾Ò»¶¨·¢ÎÄÕ 2026-04-02 7/350 2026-04-03 09:54 by linyelide
[¿¼ÑÐ] Ò»Ö¾Ô¸aÇø211£¬085601-307·ÖÇóµ÷¼Á +13 µ³¼ÎºÀ 2026-03-31 26/1300 2026-04-03 08:33 by 495374996
[¿¼ÑÐ] 379Çóµ÷¼Á +3 ?¿à¹Ï²»¿à 2026-04-01 3/150 2026-04-01 20:09 by ÄºÔÆÇ庮
[¿¼ÑÐ] ±¾2Ò»Ö¾Ô¸C9-333·Ö£¬²ÄÁÏ¿ÆÑ§Ó빤³Ì£¬Çóµ÷¼Á +9 ÉýÉý²»½µ 2026-03-31 9/450 2026-03-31 18:01 by Î޼ʵIJÝÔ­
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û