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Calculating Freezing Point of NaCl-NH4Cl-H2O Ternary System by SEHM Model
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Xiaoxiao WEI1, Xiancheng ZHAN2, *
Pharmacy Today | 2026, 36(1) : 16 - 18
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Pharmacy Today | 2026, 36(1): 16-18
Calculating Freezing Point of NaCl-NH4Cl-H2O Ternary System by SEHM Model
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Xiaoxiao WEI1, Xiancheng ZHAN2, *
Affiliations
  • 1.Shandong Vocational College of Special Education, Jinan, Shandong 250000, China
  • 2.Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, China
Published: 2026-01-25 doi: 10.12048/j.issn.1674-229X.2026.01.004
Outline
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OBJECTIVE

To predict the freezing point of the NaCl-NH4Cl-H2O ternary system using the semi-empirical hydration model (SEHM).

METHODS

The freezing point of the ternary system was computed from the solution concentration based on the SEHM model, and compared with values obtained from air humidity cryoscopy and cooling curve cryoscopy (FPD-4A cryoscope).

RESULTS

The freezing points calculated by the SEHM model showed good agreement with those measured by air humidity cryoscopy and cooling curve cryoscopy. However, the cooling curve method was limited to dilute solutions due to the limited measurement range of the instrument.

CONCLUSION

The SEHM model provides a reliable approach for calculating the freezing point of the NaCl-NH4Cl-H2O ternary system based on solution concentration.

NaCl-NH4Cl-H2O ternary system  /  freezing point  /  SEHM model  /  air humidity cryoscopy  /  cooling curve cryoscopy
魏箫箫, 詹先成. 采用半经验水化模型（SEHM）计算NaCl-NH4Cl-H2O三元体系溶液的冰点. 今日药学, 2026 , 36 (1) : 16 -18 . DOI: 10.12048/j.issn.1674-229X.2026.01.004
Xiaoxiao WEI, Xiancheng ZHAN. Calculating Freezing Point of NaCl-NH4Cl-H2O Ternary System by SEHM Model[J]. Pharmacy Today, 2026 , 36 (1) : 16 -18 . DOI: 10.12048/j.issn.1674-229X.2026.01.004
Appendix
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Year 2026 volume 36 Issue 1
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Article Info
doi: 10.12048/j.issn.1674-229X.2026.01.004
  • Receive Date：2025-02-24
  • Online Date：2026-09-23
  • Published：2026-01-25
Article Data
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History
  • Received：2025-02-24
Funding
Affiliations
    1.Shandong Vocational College of Special Education, Jinan, Shandong 250000, China
    2.Key Laboratory of Drug Targeting and Drug Delivery Systems, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610041, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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