ʻO ke ʻano o ka hoʻoholo ʻana i ke ʻano o ka Sodium Carboxymethyl Cellulose

ʻO ka hoʻoholo ʻana i ke kiʻekiʻe o ka hoʻololi ʻana (DS) o ka sodium carboxymethyl cellulose (CMC) he mea koʻikoʻi no ka mālama ʻana i ka maikaʻi a me ka hōʻoia ʻana i ke kūpaʻa o kāna mau waiwai a me kāna hana. Hiki ke hoʻohana ʻia kekahi mau ala no ka hoʻoholo ʻana i ka DS o CMC, me ka titration a me nā ʻenehana spectroscopic ka mea maʻamau. Eia ka wehewehe kikoʻī o ke ʻano titration no ka hoʻoholo ʻana i ka DS o ka sodium CMC:

1. Kumu:

• Ke hilinaʻi nei ke ʻano titration i ka hopena ma waena o nā pūʻulu carboxymethyl i CMC a me kahi hopena maʻamau o kahi kumu ikaika, ʻo ia hoʻi ka sodium hydroxide (NaOH), ma lalo o nā kūlana hoʻomalu.
• Hoʻopili nā hui Carboxymethyl (-CH2-COOH) i CMC me NaOH e hana i ka sodium carboxylate (-CH2-COONa) a me ka wai. ʻO ka nui o kēia hopena e like me ka helu o nā hui carboxymethyl i loko o ka mole CMC.

2. Reagents a me na lako:

• ʻO ka sodium hydroxide (NaOH) ka hopena maʻamau o ka ʻike ʻike.
• Laʻana CMC.
• Hōʻike hōʻike waika (e laʻa, phenolphthalein).
• Burette.
• Puke kōkō.
• Wai hoʻoheheʻe.
• Mea hoʻoulu a i ʻole mea hoʻoheheʻe magnetic.
• Kaulike analytical.
• pH mika a i ʻole pepa kuhikuhi.

3. Kaʻina hana:

1. Hoʻomākaukau laʻana:
   • E kaupaona pono i ka nui kiko'ī o ka hāpana CMC me ka hoʻohana ʻana i ke koena analytical.
   • E hoʻoheheʻe i ka laʻana CMC i loko o ka nui o ka wai i hoʻomaʻemaʻe ʻia e hoʻomākaukau i kahi hopena o ka ʻike ʻike. E hōʻoia i ka hui ʻana e loaʻa kahi hopena homogeneous.
2. Titration:
   • Pipette i ka nui ana o ka CMC solution i loko o ka ipu conical.
   • E hoʻohui i kekahi mau kulu o ka hōʻailona acid-base (e laʻa, phenolphthalein) i ka ipu. Pono e ho'ololi ke kala ma ka hope o ka titration, ma kahi o ka pH 8.3-10.
   • E hoʻokaʻawale i ka hāʻina CMC me ka hoʻonā NaOH maʻamau mai ka burette me ka hoʻoulu mau ʻana. E hoʻopaʻa i ka nui o ka hopena NaOH i hoʻohui ʻia.
   • E hoʻomau i ka titration a hiki i ka hopena, hōʻike ʻia e ka hoʻololi ʻana o ka waihoʻoluʻu o ka mea hōʻailona.
3. Heluhelu:
   • E helu i ka DS o CMC me ka hoʻohana ʻana i kēia ʻano:
   $��=�\times �\times �NaOH�CMC$

   DS=mCMC​V×N×MNaOH​​

   Ma hea:

   • $��$

     DS = Degere o ka pani.

   • $�$

     V = Volume o ka hopena NaOH i hoʻohana ʻia (ma nā lita).

   • $�$

     N = Ka maʻamau o ka hoʻonā NaOH.

   • $�NaOH$

     MNaOH = Molecular kaumaha o NaOH (g/mol).

   • $�CMC$

     mCMC = Ka nui o ka laʻana CMC i hoʻohana ʻia (ma ka grams).

4. Ka wehewehe ʻana:
   • Hōʻike ka DS i helu ʻia i ka helu awelika o nā hui carboxymethyl no kēlā me kēia ʻāpana glucose i ka mole CMC.
   • E hana hou i ka loiloi i nā manawa he nui a helu i ka awelika DS e hōʻoia i ka pololei a me ka hilinaʻi o nā hopena.

4. Noonoo:

• E hōʻoia i ka calibration kūpono o nā mea hana a me ka standardization o nā reagents no nā hopena pololei.
• E mālama pono i ka hoʻonā NaOH me ka mālama ʻana no ka mea hiki ke hana i ke ahi.
• Hana i ka titration ma lalo o nā kūlana i hoʻopaʻa ʻia e hōʻemi i nā hewa a me ka loli.
• E hōʻoia i ke ʻano me ka hoʻohana ʻana i nā kūlana kuhikuhi a i ʻole ka hoʻohālikelike hoʻohālikelike me nā ʻano hana ʻē aʻe.

Ma ka hahai ʻana i kēia ʻano titration, hiki ke hoʻoholo pololei ʻia ke kiʻekiʻe o ka hoʻololi ʻana o ka sodium carboxymethyl cellulose (CMC), e hāʻawi ana i ka ʻike waiwai no ka hoʻokele maikaʻi a me nā kumu hoʻolālā i nā ʻoihana like ʻole.