²é¿´: 3990  |  »Ø¸´: 10

liuxx1683

ľ³æ (СÓÐÃûÆø)

[½»Á÷] ²»ÈÜÓÚË®ÎïÖÊÒªÔõô²âpHÖµ ÒÑÓÐ3È˲ÎÓë

ÇëÎʸ÷룬ÔڲⲻÈÜÓÚˮҩÎïµÄpHֵʱ£¬ÊÇÔõô²Ù×÷µÄ£¿
±ÈÈç˵¿ËÀ­Ã¹ËØ£¬ÔÚË®Öм¸ºõ²»ÈÜ£¬°´Ò©µäµÄ·½·¨£¬µÃµ½ÊÇÒ»¸öÐü×ÇÒº£¬ÄÇÕâÖÖÇé¿ö²âpHÖµ£¬ÒªÔõô°ìÄØ£¿
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
»ØÌûÖ§³Ö ( ÏÔʾ֧³Ö¶È×î¸ßµÄǰ 50 Ãû )

penn007

½ð³æ (СÓÐÃûÆø)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÃÀ¹úÒ©µä¹æ¶¨¿ËÀ­Ã¹ËصÄpHΪ8.0 µ½10.0£¬ÓÃË®£º¼×´¼£¨19:1£©»ìºÏÈܼÁÅäÖÆ2mg/mLµÄÐü¸¡ÈÜÒº£¬È»ºó²âpHÖµ£¨at 25+-2ÉãÊ϶ȣ©¡£
pH < 791 >: between 8.0 and 10.0, determined in a 1 in 500 suspension of it in a mixture of water and methanol.
pH ²â¶¨ÒÇ׼ȷµ½0.02 pH unit¼´¿É¡££¨ capable of reproducing pH values to 0.02 pH unit £©£¬Ó¦¸ÃÊDZ߽Á°è£¨ÓôÅÁ¦½Á°è×Ó²»Í£µØ½Á°è£©±ß²â¶¨pH¡£
Èç¹ûpH¶ÁÊý²»Îȶ¨£¬»»Ò»Ì¨pH¼ÆÔٲⶨÊÔÊÔ¿´¡£

pH < 791 >: Prepare a slurry by weighing 20.0 g +- 100 mg of Topical Starch, transferring to a suitable nonmetallic container, and adding 100 mL of water. Agitate continuously at a moderate rate for 5 minutes, then stop agitation, and immediately determine the pH to the nearest 0.1 unit: the pH, determined potentiometrically, is between 4.5 and 7.0.  µí·ÛÊDz»ÄÜÍêÈ«ÈܽâÓÚË®Öеģ¬¿ÉÒÔÖÆ³É»ìÐüÒº£¬ÃÀ¹úÒ©µäUSP¹æ¶¨ÊǽÁ°è5·ÖÖÓºóÍ£Ö¹½Á°è£¬Á¢¼´²â¶¨pH£¬pH׼ȷµ½0.1 pH unit¡£

[ Last edited by penn007 on 2013-1-11 at 01:18 ]
7Â¥2013-01-11 13:56:34
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
ÆÕͨ»ØÌû

fxzxp

Ìú¸Ëľ³æ (СÓÐÃûÆø)

Ö±½Ó²â¶¨
2Â¥2013-01-10 10:49:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liuxx1683

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by fxzxp at 2013-01-10 10:49:16
Ö±½Ó²â¶¨

ÄãµÄÒâ˼ÊÇÖ±½ÓÄÃÕâ¸öÐü×ÇÒº²â¾Í¿ÉÒÔÁË£¿¿ÉÊǺܲ»Îȶ¨Å¶£¬±Ï¾¹²»ÊǾùÒ»µÄ¡£
3Â¥2013-01-10 13:56:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

460016859

Òø³æ (³õÈëÎÄ̳)

¼ûµ½Ò©µäÉÏÓÐÕâÖÖÄÃË®ÈܽâÁ˵ÄÂËÒºÀ´²âµÄ¡£
Nevergiveup!
4Â¥2013-01-10 14:04:23
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liuxx1683

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by 460016859 at 2013-01-10 14:04:23
¼ûµ½Ò©µäÉÏÓÐÕâÖÖÄÃË®ÈܽâÁ˵ÄÂËÒºÀ´²âµÄ¡£

ÕâÓ¦¸ÃÊÇÔÚרÂÛÀïÌáµ½µÄ£¬¿´Ò©µä¸½Â¼£¬¹ØÓÚ²âpHÖµµÄ£¬Ã»ÓоßÌå̸µ½ÕâÖÖÇé¿öµÄÒ»°ã´¦Àí·½·¨
5Â¥2013-01-10 14:54:28
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

fxzxp

Ìú¸Ëľ³æ (СÓÐÃûÆø)

¡ï
Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
ÒýÓûØÌû:
3Â¥: Originally posted by liuxx1683 at 2013-01-10 13:56:38
ÄãµÄÒâ˼ÊÇÖ±½ÓÄÃÕâ¸öÐü×ÇÒº²â¾Í¿ÉÒÔÁË£¿¿ÉÊǺܲ»Îȶ¨Å¶£¬±Ï¾¹²»ÊǾùÒ»µÄ¡£...

Æäʵ£¬¶ÔÓÚ²»ÈÜÓÚË®µÄÒ©Îï¶øÑÔ£¬²â¶¨Ë®ÈÜÒºpHÒâÒå²»´ó£¬¸ü¶àµÄÓ¦¸Ã¹Ø×¢ÔÚË®ºÍ»º³åÒºÖÐÈܽâ¶È£¬ÒÔ¼°lgP/DÓëpKaÇé¿ö¡£
¶ÔÓÚ²»ÈÜÓÚË®µÄÒ©ÎïpHÖµ²â¶¨£¬¿ÉÒÔÔÚÒ»¶¨Î¶ÈÏÂÈ¡Èܽâ¶È²â¶¨ÓÃÈÜÒº²â¶¨¼´¿É¡£´ËʱӦ¸ÃÊÇÒ©Îï±¥ºÍ״̬³ÎÇåË®ÈÜÒºµÄpH²â¶¨½á¹û¡£
¸öÈ˹۵㡣
6Â¥2013-01-11 10:18:18
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhengyuanhui

½û³æ (СÓÐÃûÆø)

±¾ÌûÄÚÈݱ»ÆÁ±Î

8Â¥2013-01-17 08:33:45
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liuxx1683

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
7Â¥: Originally posted by penn007 at 2013-01-11 13:56:34
ÃÀ¹úÒ©µä¹æ¶¨¿ËÀ­Ã¹ËصÄpHΪ8.0 µ½10.0£¬ÓÃË®£º¼×´¼£¨19:1£©»ìºÏÈܼÁÅäÖÆ2mg/mLµÄÐü¸¡ÈÜÒº£¬È»ºó²âpHÖµ£¨at 25+-2ÉãÊ϶ȣ©¡£
pH < 791 >: between 8.0 and 10.0, determined in a 1 in 500 suspension of it ...

±ß½Á°è±ß²â£¬¶ÔÓÚ²»ÊǾùÒ»µÄÈÜÒºÀ´Ëµ£¬ÎÒ¾õµÃÄĄ̈pH¼Æ¶¼²»»áÎȶ¨¡£ÎұȽÏÇãÏòÓÚ½Á°èÒ»¶Îʱ¼ä»òÊdz¬ÉùÒ»¶Îʱ¼äÖ®ºó£¬Á¢¼´²â¡£
9Â¥2013-01-18 09:18:36
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

liuxx1683

ľ³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
8Â¥: Originally posted by zhengyuanhui at 2013-01-17 08:33:45
·ÇË®ÈÜÒºµÎ¶¨

û¼û¹ý£¬Ö»ÖªµÀ²âº¬Á¿¿ÉÒÔÓ÷ÇË®ÈÜÒºµÎ¶¨
10Â¥2013-01-18 09:18:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ liuxx1683 µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ²ÄÁÏר˶306Ó¢Ò»Êý¶þ +10 z1z2z3879 2026-03-16 13/650 2026-03-18 14:20 by 007_lilei
[¿¼ÑÐ] 070300»¯Ñ§319Çóµ÷¼Á +6 ½õÀð0909 2026-03-17 6/300 2026-03-18 13:22 by Iveryant
[¿¼ÑÐ] ¿¼ÑÐÇóµ÷¼Á +3 éÙËÌ. 2026-03-17 4/200 2026-03-17 21:43 by ÓÐÖ»ÀêÅ«
[¿¼ÑÐ] 328Çóµ÷¼Á£¬Ó¢ÓïÁù¼¶551£¬ÓпÆÑо­Àú +3 ÉúÎ﹤³Ìµ÷¼Á 2026-03-16 8/400 2026-03-17 19:03 by Wangjingyue
[¿¼ÑÐ] 302Çóµ÷¼Á +9 ¸ºÐÄÕßµ±Öï 2026-03-11 9/450 2026-03-17 17:13 by ruiyingmiao
[¿¼ÑÐ] 293Çóµ÷¼Á +6 ÊÀ½çÊ׸» 2026-03-11 6/300 2026-03-17 17:04 by ruiyingmiao
[¿¼ÑÐ] 290Çóµ÷¼Á +6 ¿×Ö¾ºÆ 2026-03-12 11/550 2026-03-17 14:41 by ÖÜÖÛÖÛ77
[¿¼ÑÐ] 283Çóµ÷¼Á +3 Ìý·ç¾ÍÊÇÓꣻ 2026-03-16 3/150 2026-03-17 07:41 by ÈÈÇéɳĮ
[¿¼ÑÐ] 326Çóµ÷¼Á +4 ŵ±´¶û»¯Ñ§½±êéê 2026-03-15 7/350 2026-03-16 17:11 by ŵ±´¶û»¯Ñ§½±êéê
[¿¼ÑÐ] 0703 ÎïÀí»¯Ñ§µ÷¼Á +3 ÎÒ¿ÉÒÔÉϰ¶µÄ¶Ô 2026-03-13 5/250 2026-03-16 10:50 by ÎÒ¿ÉÒÔÉϰ¶µÄ¶ÔÂ
[¿¼ÑÐ] 085601²ÄÁϹ¤³Ì315·ÖÇóµ÷¼Á +3 yang_0104 2026-03-15 3/150 2026-03-15 10:58 by peike
[¿¼ÑÐ] ²ÄÁÏÓ뻯¹¤ 323 Ó¢Ò»+Êý¶þ+Îﻯ£¬Ò»Ö¾Ô¸£º¹þ¹¤´ó ±¾È˱¾¿ÆË«Ò»Á÷ +4 ×ÔÓɵÄ_·ÉÏè 2026-03-13 5/250 2026-03-14 19:39 by hmn_wj
[»ù½ðÉêÇë] ÏÖÔÚÈçºÎ»Ø±ÜÈ¥ÄêµÄijһ¸öר¼Ò£¬²»ÖªµÀÃû×Ö +3 zk200107 2026-03-12 6/300 2026-03-14 17:13 by zk200107
[¿¼ÑÐ] ѧ˶285Çóµ÷¼Á +13 Wisjxn 2026-03-12 46/2300 2026-03-14 10:33 by JourneyLucky
[¿¼ÑÐ] 26µ÷¼Á/²ÄÁÏ¿ÆÑ§Ó빤³Ì/×Ü·Ö295/ÇóÊÕÁô +9 2026µ÷¼ÁÏÀ 2026-03-12 9/450 2026-03-13 20:46 by 18595523086
[¿¼ÑÐ] 295Çóµ÷¼Á +3 Сذ×ÐÖ­ 2026-03-12 3/150 2026-03-13 15:17 by vgtyfty
[¿¼ÑÐ] ÍÁľµÚÒ»Ö¾Ô¸276Çóµ÷¼Á£¬¿ÆÑкͼ¼ÄÜÊ®·Ö·á¸»£¬ÇóÐÂÐË·½ÏòµÄµ¼Ê¦ÊÕÁô +3 ÍÁľСÌì²Å 2026-03-12 3/150 2026-03-13 15:01 by JourneyLucky
[¿¼ÑÐ] 328»¯¹¤×¨Ë¶Çóµ÷¼Á +4 ¡££¬¡££¬¡££¬¡£i 2026-03-12 4/200 2026-03-13 14:44 by JourneyLucky
[¿¼ÑÐ] 070303Ò»Ö¾Ô¸Î÷±±´óѧѧ˶310ÕÒµ÷¼Á +3 dÈçÔ¸Éϰ¶ 2026-03-13 3/150 2026-03-13 10:43 by houyaoxu
[¿¼ÑÐ] 270Çóµ÷¼Á 085600²ÄÁÏÓ뻯¹¤×¨Ë¶ +3 YXCT 2026-03-11 3/150 2026-03-13 10:13 by houyaoxu
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û