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- Reference : AOAC 985.29 Total Dietary Fiber in Foods
- Tested with VELP Scientifica GDE Enzymatic Digester (Code F30400209) and CSF6  
Filtration Unit (Code F30420210).  
Protein determination was performed with DK 6 Kjeldahl Digestion Unit (Code F30100182) and  
UDK 159 Automatic Kjeldahl Distillation & Titration System (Code F30200150) |
¼ ·Ð
½ÄÀÌ ¼¶À¯´Â ¼ö¿ë¼º ¹× ºÒ¿ë¼º ´Ù´ç·ù (¿Ã¸®°í´ç, cutin, suberins, lignins) ¿Í °°Àº º¹ÀâÇÑ À¯±â ¹°ÁúÀÇ È¥ÇÕ¹°·Î¼
»ç¶÷ÀÇ À§Àå¿¡¼ ¼ÒȵÇÁö ¾ÊÀ¸¸ç Æ÷¸¸°¨À» ³ôÀÌ°í Àå ±â´É °³¼±ÀÇ È¿°ú°¡ ÀÖ´Â Áß¿äÇÑ ¿µ¾ç¼ÒÀÌ´Ù.
ÄÜÇ÷¹ÀÌÅ© »ùÇÿ¡¼ ÃÑ ½ÄÀ̼¶À¯ (Total Dietary Fiber, TDF) ÇÔ·®ºÐ¼®
½ÄÀÌ ¼¶À¯ÀÇ È®Àο¡´Â È¿¼Ò¹ý°ú ¹«°ÔÃøÁ¤¹ýÀ» ÇÔ²² »ç¿ëÇÑ´Ù.
1. »ùÇà : °ÇÁ¶½ÃŲ fat-free ½ÄÇ° µÎ°³¸¦ »ùÇ÷ΠÀÌ¿ë
2. ¸ÕÀú ¿¿¡ ¾ÈÁ¤ÇÑ ¥á-¾Æ¹Ð¶ó¾ÆÁ¦·Î ó¸®ÇÏ¿© »ùÇÃÀ» Á©¶óƾÈ
3. ´Ù½Ã amyloglucosidase ·Î ó¸®ÇÏ¿© »ùÇÿ¡ ÀÖ´Â ÀüºÐÀ» ¸ðµÎ °¡¼öºÐÇØ
4. Protease ¸¦ ó¸®ÇÏ¿© »ùÇó» ´Ü¹éÁúÀ» Á¦°Å.
5. ¿¡Åº¿ÃÀ» ó¸®ÇÏ¿© ¼ö¿ë¼º ½ÄÀ̼¶À¯ (soluble dietary fiber) ¸¦ ħÀü
6. filter ¸¦ ÀÌ¿ëÇÏ¿© ħÀü¹°À» ¿©°ú
7. ¿¡Åº¿Ã °ú ¾Æ¼¼ÅæÀ» ÀÌ¿ëÇÏ¿© washing
8. ¿©°ú/¼¼Ã´½ÃŲ ħÀü¹°À» °ÇÁ¶ÇÑ ÈÄ ¹«°Ô ÃøÁ¤ (W1)
9. µÎ°³ÀÇ »ùÇà Áß Çϳª´Â ºÐÇصÇÁö ¾Æ´ÏÇÑ ´Ü¹éÁúÀÇ ¾çÀ» ºÐ¼®ÇÏ´Â ½ÇÇèÀ» ÇÏ°í ¹«°Ô ÃøÁ¤ (W2)    
´Ù¸¥ ÇϳªÀÇ »ùÇÃÀº °í¿Â¿¡¼ üéûù(ashing) ½ÃŲ ÈÄ ¹«°Ô¸¦ ÃøÁ¤ÇÑ´Ù (W3).
    ¡Ø ÃÑ ½ÄÀ̼¶À¯ ÇÔ·® = W1 - W2 -W3
ÇÊ¿äÀåºñ
- 6 glass beakers 400 ml (code A00000999)
- Magnetic stirring bars, 6 x 35 mm (code A00001056)
- Pool balls (code A00000241)
- Fan oven
- Muffle furnace
- Desiccator
- Analytical balance 0.1 mg accuracy
- pH-meter standardized at pH 4.0 and 7.0
- Glass crucibles P2 (code A00000140)
- Automated Pipettor 1 ml, 100 ¥ìl, 200 ¥ìl
- Aluminum foils
ÇÊ¿ä½Ã¾à
- Petroleum ether 40-60 ¡É, analytical grade
- Ethanol 95 % v/v, Ethanol 78 % v/v - 207 ml of distilled water diluted to 1 L with
  95 % ethanol.
  Mix and if necessary, dilute again to volume with 95 % ethanol
- Acetone, analytical grade
- Phosphate buffer, 0.08 M, pH 6.0 - 1.400 g of sodium phosphate dibasic anhydrous
  (Na2HPO4) and 8.400 g of sodium phosphate monobasic anhydrous (NaH2PO4)
  dissolved in 1 L distilled water.
  Check pH with pH-meter. Adjust to pH 6.0 if necessary using either sodium
  hydroxide solution or phosphoric acid solution
- Alpha-amylase, heat-stable, solution
- Protease solution - 50 mg in 1 ml phosphate buffer
- Amyloglucosidase solution
- Sodium hydroxide solution, 1.0 N, analytical grade
- Sodium hydroxide solution 0.275 N - 275 ml of 1.0 N sodium hydroxide diluted to 1 L
  with distilled water
- Hydrochloric acid solution, 1.0 N, analytical grade
- Hydrochloric acid solution 0.325 N - 325 ml of 1.0 N hydrochloric acid diluted to 1 L
  with distilled water
- Celite, acid washed
Sample : ÄÜÇ÷¹ÀÌÅ©, Fiber labeled value: 3 %
Sample Preparation : ±ÕÁúÈÇÑ »ùÇÃÀ» 105 ¡Æ C, 24h µ¿¾È °ÇÁ¶ÇÏ°í,
µ¥½ÃÄÉÀÌÅÍ¿¡¼ ³Ã°¢ÇÑ µÚ,                    
                 
0.3 - 0.5 mm ¸Þ½¬·Î ºÐ·ù ¹× ºÐ¼âÇÏ¿© »ùÇÃÀ» ÁغñÇÑ´Ù.
Enzymatic Digestion and Filtration Procedure
1. 400 ml ºñÄ¿¿¡ µé¾îÀÖ´Â 50ml Àλ꿰¿ÏÃæ¾× (pH 6.0) ¿¡ 1g ÀÇ »ùÇÃÀ» ³Ö°í Àß ¼¯Àº ÈÄ    
¿©±â¿¡ magnetic stirring bar ¸¦ ³Ö´Â´Ù.
2. ¿¾ÈÁ¤¼º ¥á-¾Æ¹Ð¶ó¾ÆÁ¦ 100 ¥ìl ¸¦ ÷°¡ÇÑ ÈÄ ÃæºÐÈ÷ ¼¯´Â´Ù. ºñÄ¿¸¦ ¾Ë·ç¹Ì´½ È£ÀÏ·Î µ¤°í
    GDE ¾È¿¡ ºñÀÌÄ¿¸¦ 95-100 ¡É, 30 ºÐ°£ À§Ä¡½ÃŲ´Ù.
ÀÌ ¶§ magnetic stirring ±â´ÉÀ» »ç¿ëÇÏ¿©     95-100 ¡É ÀÇ ¿ÀÌ ºñÄ¿ ³»ºÎ¿¡ ±ÕÀÏÇÏ°Ô Àü´ÞµÇµµ·Ï ÇÑ´Ù.
3. »ùÇÃÀÌ ´ã±ä ºñÄ¿¸¦ ²¨³» ½Ç¿ÂÀ¸·Î ³Ã°¢ÇÑ´Ù.
4. ¾Ë·ç¹Ì´½ È£ÀÏÀ» Á¦°ÅÇÏ°í Çöó½ºÅ© ³»º®À» Áõ·ù¼ö 10 ml ·Î Ç󱺴Ù.    
±× ÈÄ 0.275 N NaOH ¿ë¾× ¾à 10 ml ¸¦ »ç¿ëÇÏ¿© »ùÇÃÀÇ pH ¸¦ 7.5 ¡¾ 0.2 ·Î Á¶Á¤ÇÑ´Ù.
5. GDE ÀÇ ¿Âµµ¸¦ 60 ¡É·Î ¼³Á¤ÇÑ´Ù.
6. ºñÄ¿¿¡ ÇÁ·ÎÅ×¾ÆÁ¦ ¿ë¾× 100 ¥ìl ¸¦ ³Ö°í ¾Ë·ç¹Ì´½ È£ÀÏÀ» µ¤´Â´Ù.    
GDE ¿¡¼ ¿¬¼ÓÀûÀ¸·Î ±³¹ÝÇÏ¸é¼ 60 ¡É, 30 ºÐ°£ °¡¿ÇÑ´Ù.
7. ½Ç¿ÂÀ¸·Î ³Ã°¢ÇÑ´Ù.     ±× ÈÄ 0.325 N ¿°»ê ¿ë¾× ¾à 10 ml ¸¦ »ç¿ëÇÏ¿© pH ¸¦ 4.5 ¡¾ 0.2 ·Î Á¶Á¤ÇÑ´Ù.
8. ºñÄ¿¿¡ ¾Æ¹Ð·Î±Û·çÄڽôÙÁ¦ ¿ë¾× 200 ¥ìl ¸¦ ³Ö°í GDE ¿¡¼ ¿¬¼ÓÀûÀ¸·Î ±³¹ÝÇÏ¸é¼    
60 ¡É, 30 ºÐ°£ °¡¿ÇÑ´Ù.
9. magnetic stirring bar ¸¦ Á¦°ÅÇÏ°í 60 ¡É ·Î ¿¹¿ µÈ 95 % ¿¡Åº¿Ã 280 mL ¸¦ ³Ö´Â´Ù.    
±× ÈÄ ½Ç¿Â¿¡¼ 60 ºÐ°£ ħÀü¹°ÀÇ Çü¼ºÀ» ±â´Ù¸°´Ù.
10. À¯¸® µµ°¡´Ï¿¡ ¾à 1g ÀÇ ¼¿¶óÀÌÆ®¸¦ ³Ö°í 5 ½Ã°£ µ¿¾È 550 ¡É ÀÇ oven ¿¡ ³Ö°í 0.1 mg ±îÁö      
º¯È°¡ ¾øµµ·Ï ³Ã°¢ ¹× Ī·®À» ¹Ýº¹ÇÑ´Ù.
11. ¼¿¶óÀÌÆ®¸¦ 78 % EtOH ¼ö ml ¸¦ »ç¿ëÇÏ¿© Àû½Å´Ù.
12. ¼¿¶óÀÌÆ®°¡ ´ã±ä µµ°¡´Ï¸¦ CSF 6 ¿©°ú Àåºñ¿¡ ¼³Ä¡ÇÑ ÈÄ Áø°øÀ» °¡ÇÑ´Ù.      
Funnel À» »ç¿ëÇÏ¿© 9¹ø °úÁ¤±îÁö ¿Ï·áÇÑ »ùÇÃÀ» µµ°¡´Ï·Î ¿Å±â°í ¿©°ú¸¦ ½ÃÀÛÇÑ´Ù.
13. ¿©°ú ÈÄ µµ°¡´Ï ÀÜÀ¯¹°À» 78 % ¿¡Åº¿Ã, 95 % ¿¡Åº¿Ã, ¾Æ¼¼Åæ È¥ÇÕ¾×À» »ç¿ëÇÏ¿© Ç󱺴Ù.
14. drying oven À» ÀÌ¿ëÇÏ¿© 105 ¡É, 24 h ¿¡¼ °ÇÁ¶½ÃŲ´Ù. ±× ÈÄ 0.1 mg ±îÁö º¯È°¡ ¾øµµ·Ï      
³Ã°¢ ¹× Ī·®À» ¹Ýº¹ÇÏ¿© ÀÜ·ù¹°ÀÇ ¾çÀ» È®ÀÎÇÑ´Ù.
15. ÀÜ·ù¹° Áß ºÒ¿ë¼º ´Ü¹éÁú ¹× ȸºÐÀº Kjeldahl ÀåÄ¡ ¹× ȸºÐ ºÐ¼®À» ÅëÇØ È®ÀÎÇÏ¿© ½ÄÀ̼¶À¯ÀÇ      
¾çÀ» È®ÀÎÇÑ´Ù.
Typical Results
°á·Ð
ÀÌ Å×½ºÆ®¸¦ ÅëÇØ GDE ¿Í CSF6 system ÀÌ ÃÑ ½ÄÀ̼¶À¯ ÇÔ·®À» ºÐ¼®Çϴµ¥ ÀûÇÕÇÑ Àåºñ¶ó´Â °ÍÀ» ¾Ë ¼ö ÀÖÀ¸¸ç
±× °á°úÀÇ ¼öÄ¡ ¿ª½Ã ¸Å¿ì Á¤¹ÐÇÏ°í ½Å·Ú¼ºÀÖ´Â °ªÀ̶ó´Â °ÍÀ» ¾Ë ¼ö ÀÖ´Ù.
GDE ¿Í CSF8 system ÀÇ ÀåÁ¡
1. ÇÙ½ÉÀûÀÎ È¿¼Ò¹ÝÀÀ¿¡¼ ¸Å¿ì Á¤¹ÐÇÑ ¿ÂµµÁ¶ÀýÀÌ °¡´É
2. µðÁöÅРŸÀÌ¸Ó ³»Àå (GDE)
3. 6°³ÀÇ »ùÇÃÀ» filteration °ú washing Çϴµ¥ 20ºÐÀ̸é ÃæºÐ
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