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缓冲液的特点是,溶液遇见少量得酸,碱,或者少量水稀释时,其PH值基本保持不变。


保持系统的PH值保持基本不变,如在科研或生产中,保持溶液的PH值不变,校正PH计,人体的血液系统就是缓冲溶液,当溶解和放出二氧化碳时,其PH值基本不变。

Useful pH Ranges of Selected Biological Buffers (25 °C, 0.1M)

Buffers Useful pH Range pKa(at 20°C) pKa(at 25°C) pKa(at 37°C)
BES 6.4–7.8 7.17 7.09 6.9
TEA 7.3–8.3 n/a 7.8 n/a
CHES 8.6–10.0 9.55 9.49 9.36
MOPS 6.5–7.9 7.28 7.2 7.02
CAPS 9.7–11.1 10.56 10.4 10.02
AMPD 7.8–9.7 n/a 8.8 n/a
AMP 9.0–10.5 n/a 9.7 n/a
Bicine 7.6–9.0 8.35 8.26 8.04
EPPS 7.3–8.7 n/a 8 n/a
ADA 6.0–7.2 6.65 6.59 6.46
TAPS 7.7-9.1 8.49 8.4 8.18
MES 5.5–6.7 6.16 6.1 5.97
Gly-Gly 7.5–8.9 n/a 8.2 n/a
PIPES 6.1–7.5 6.8 6.76 6.66
Tricine 7.4–8.8 8.16 8.05 7.8
Bis-Tris Propane 6.3–9.5 n/a 6.8, 9.0 n/a
MOPSO 6.2–7.6 n/a 6.9 6.75
AMPSO 8.3–9.7 n/a 9 9.1
DIPSO 7.0–8.2 n/a 7.6 7.35
TAPSO 7.0–8.2 n/a 7.6 7.39
Bis-Tris 5.8–7.2 n/a 6.5 6.36
CAPSO 8.9–10.3 n/a 9.6 9.43
TES 6.8–8.2 7.5 7.4 7.16
HEPES 6.8–8.2 7.55 7.48 7.31
aces 6.1–7.5 6.88 6.78 6.54
Trizma 7.0–9.0 8.2 8.06 7.72
产品编号 CAS号 项目名称规格 分子式 加入购物车
B802277 10191-18-1 N,N-(2-羟乙基)-2-氨基乙磺酸(BES), ≥99%(T)
BES, ≥99%(T)
C6H15NO5S
B802278 10191-18-1 N,N-(2-羟乙基)-2-氨基乙磺酸(BES), ≥99.5%(T)
BES, ≥99.5%(T)
C6H15NO5S
T819270 102-71-6 三乙醇胺, Standard for GC, ≥99.5% (GC)
Triethanolamine, Standard for GC, ≥99.5% (GC)
C6H15NO3
T819271 102-71-6 三乙醇胺, AR,98%
Triethanolamine, AR,98%
C6H15NO3
T819274 102-71-6 三乙醇胺, ≥99.0%(GC)
Triethanolamine, ≥99.0%(GC)
C6H15NO3
C805238 103-47-9 2-环己胺基乙磺酸, ≥99.5%(T)
N-Cyclohexyltaurine (CHES), ≥99.5%(T)
C8H17NO3S
M813154 1132-61-2 3-(N-吗啡啉)丙磺酸, ≥99.0%(T)
MOPS, ≥99.0%(T)
C7H15NO4S
M813155 1132-61-2 3-(N-吗啡啉)丙磺酸, ≥99.5% (T)
MOPS, ≥99.5% (T)
C7H15NO4S
C804657 1135-40-6 3-(环已胺)-1-丙磺酸, 超纯级
CAPS, 超纯级
C9H19NO3S
A800466 115-69-5 2-氨基-2-甲基-1,3-丙二醇, 99%
2-Amino-2-methyl-1,3-propanediol(AMPD), 99%
C4H11NO2
N802774 150-25-4 N,N-双(2-羟乙基)甘氨酸, 超纯级
N,N-Bis(2-hydroxyethyl)glycine (Bicine), 超纯级
C6H13NO4
H811192 16052-06-5 4-(2-羟乙基)-1-哌嗪丙磺酸, ≥99.0%(T)
HEPPS, ≥99.0%(T)
C9H20N2O4S
H811193 16052-06-5 4-(2-羟乙基)-1-哌嗪丙磺酸, ≥99.5%(T)
HEPPS, ≥99.5%(T)
C9H20N2O4S
N800706 26239-55-4 乙酰氨基亚胺乙酸, 超纯级
ADA, 超纯级
C6H10N2O5
T819342 29915-38-6 N-三(羟甲基)甲基-3-氨基丙磺酸, 99%
3-[N-Tris-(hydroxymethyl)methylamino]propanesulphonic (TAPS), 99%
C7H17NO6S
T819343 29915-38-6 N-三(羟甲基)甲基-3-氨基丙磺酸, ≥99.5%(T)
3-[N-Tris-(hydroxymethyl)methylamino]propanesulphonic (TAPS), ≥99.5%(T)
C7H17NO6S
M813436 4432-31-9 吗啉乙磺酸, 99%
MES, 99%
C6H13NO4S
M813439 4432-31-9 吗啉乙磺酸, ≥99.5%(T)
MES, ≥99.5%(T)
C6H13NO4S
G810395 556-50-3 双甘肽, 99%
Gly-Gly, 99%
C4H8N2O3
P815719 5625-37-6 1,4-哌嗪二乙磺酸, 99%
1,4-Piperazinediethanesulfonic acid(PIPES), 99%
C8H18N2O6S2
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