长盛同德300641-641

2021年4月26日发(作者：银行每天晚上扎帐的时候,数据都要审核你还怕个几把!兴)

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6376 á631? Physical TestsUSP 41
COLOR DETERMINATION AND STANDARDS
The perception of color and color matches is dependent on conditions of viewing and illumination. Determinations should
be made using diffuse, uniform illumination under conditions that reduce shadows and nonspectral reflectance to a minimum.
The surface of powders should be smoothed with gentle pressure so that a planar surface free from irregularities is presented.
Liquids should be 博时策略 compared in matched color-comparison tubes, against a white background. If results are |股指期货实战 found to vary with
illumination, those obtained in natural or artificial daylight are to be considered correct. Instead of visual determination, a suit-
able instrumental method may be used.
Colors of standards should be as close as possible to those of test specimens for quantifying color differences. Standards for
opaque materials are available as sets of color chips that are arranged in a visually uniform space.* Standards identified by a
letter for matching the colors of fluids can be prepared according to the accompanying table. To prepare the matching fluid
required, pipet the prescribed volumes of the colorimetric test solutions [see under Colorimetric Solutions (CS) in the section
Reagents, Indicators, 山东海龙贴吧 and Solutions] and water into one of the matching containers, and mix the solution in the container. Make
the comparison as directed in the individual |三洋食品株式会社 monograph, under the viewing conditions previously described. The matching
fluids, or other combinations of the colorimetric solutions, may be used in very low concentrations to measure deviation from
achromicity.
Matching Fluids
Parts ofParts ofParts of
MatchingCobaltousFerricCupricParts of
FluidChloride CSChloride CSSulfate CSWater
A0.10.40.14.4
B0.30.90.33.5
C0.10.60.14.2
D0.30.60.43.7
E0.41.20.33.1
F0.31.20.03.5
G0.51.20.23.1
H0.21.50.03.3
I0.42.20.12.3
J0.43.50.11.0
K0.54.50.00.0
L0.83.80.10.3
M0.12.00.12.8
N0.04.90.10.0
O0.14.80.10.0
P0.20.40.14.3
Q0.20.30.14.4
R0.30.40.24.1
S0.20.10.04.7
s
T0.50.50.43.6
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全球主要股指
á641? COMPLETENESS OF SOLUTION
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Place the quantity of the substance specified in the individual monograph in a meticulously cleansed, glass-stoppered, 10-
mL glass cylinder approximately 13 mm × 125 mm in size. Using the solvent that is specified in the monograph or on the label
of the product, fill the cylinder almost to the constriction at the neck. Shake gently to effect solution: the solution is not less
clear than an equal volume of the same solvent contained in a similar vessel and examined similarly.
* Collections of color chips, arranged according to hue, value, and chroma in a visually uniform space and suitable for use in color designation of specimens by
visual matching are available from GretagMacbeth LLC, 617 Little Britain Road, New Windsor, NY 12553-6148.
Official from May 1, 皖能电力股吧 2018
Copyright (c) 2018 The United States Pharmacopeial Convention. All rights reserved.

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USP 41Physical Tests á643? 6377
á643? TOTAL ORGANIC CARBON
Total organic carbon (TOC) is an indirect measure of organic molecules present in pharmaceutical waters measured as carbon.
Organic molecules are introduced into the water from the source water, from purification and distribution system materials,
from biofilm growing in the system, and from the packaging of sterile and nonsterile waters. TOC can also be used as a
process control attribute to monitor the performance of unit operations comprising the purification and distribution system.
A TOC measurement is not a replacement test for endotoxin or microbiological control. Although there can be a qualitative
relationship between a food source (TOC) and microbiological 华润万东股票 activity, there is no direct numerical correlation.
A number of acceptable methods exist for analyzing TOC. This chapter does not endorse, limit, or prevent any technologies
from being used, but this chapter provides guidance on how to qualify these analytical technologies for use as well as 生物制药板块 guid-
ance on how to interpret instrument results for use as a limit test.
Apparatuses commonly used to determine TOC in water for pharmaceutical use have in common the objective of oxidizing
the organic molecules in the water to produce carbon dioxide followed by the measurement of the amount of carbon diox-
ide produced. Then the amount of CO
2
produced is determined and used to calculate the organic carbon concentration in
the water.
All technologies must discriminate between the inorganic carbon, which may be present in the water from sources such as
dissolved CO
nation may be accomplished either by determining the inorganic carbon and subtracting it from the total carbon (total car-
2
and bicarbonate, and the CO
2
generated from the oxidation of organic molecules in the sample. The discrimi-
bon is the sum of organic carbon and inorganic carbon), or by purging inorganic carbon from the sample before oxidation.
Although purging may entrain organic molecules, such purgeable organic carbon is present in negligible quantities in water
for pharmaceutical use.
PROCEDURES
? B
ULK
W
ATER
The following sections apply to tests for bulk Purified Water, Water for Injection, Water for Hemodialysis, and the condensate
of Pure Steam.
Apparatus requirements:This test method is performed either as an on-line test or as an off-line laboratory test using a
calibrated instrument. The suitability of the apparatus must be periodically demonstrated as described below. In addition, it
must have a manufacturer’s specified limit of detection of 0.05 mgL (0.05 ppm) or lower of carbon.
When testing water for quality control purposes, ensure that the instrument and its data are under appropriate control and
that the sampling approaches and locations of both on-line and off-line measurements are representative of the quality of
the water used. The nature of the water production, distribution, and use should be considered when selecting either on-
line or off-line measurement.
Reagent water:Use water having a TOC level of not more than 0.10 mgL. [N
OTE
—A conductivity requirement may be
necessary in order to ensure method reliability.]
Container preparation:Organic contamination of containers results in higher TOC values. Therefore, use labware and
containers that have been scrupulously cleaned of organic residues. Any method that is effective in removing organic mat-
ter can be used (see Cleaning Glass Apparatus á1051?). Use Reagent water for the final rinse.
Standard solution:Unless otherwise directed in the individual monograph, dissolve in the Reagent water an accurately
weighed quantity of USP Sucrose RS to obtain a solution having a concentration of 1.19 mgL of sucrose (0.50 mgL of
carbon).
System suitability solution:Dissolve in Reagent water an accurately weighed quantity of USP 1,4-Benzoquinone RS to ob-
tain a solution having a concentration of 0.75 mgL (0.50 mgL of carbon).
Reagent water control:Use a suitable quantity of Reagent water obtained at the same time as that used in the preparation
of the Standard Solution and the System suitability solution.
Water sample:Obtain an on-line or off-line sample that suitably reflects the quality of water used.
Other control solutions:Prepare appropriate reagent blank solutions or other specified solutions needed for establishing
the apparatus baseline or for calibration adjustments following the manufacturer’s instructions, and run the appropriate
blanks to zero the instrument, if necessary.
System suitability:Test the Reagent water control in the apparatus, and record the response, r
General Chapters
r
W
. Repeat the test using the
Standard solution, and record the response,
Reagent water control
S
. Calculate the corrected Standard solution response, which is also the limit
response, by subtracting the response from the response of the Standard solution. The theoretical lim-
it of 0.50 mgL of carbon is equal to the corrected Standard solution response, r
r
S
? r
W
. Test the System suitability solution in
the apparatus, and record the response,
Reagent water control response from the response of the
SS
. Calculate the corrected System suitability solution response by subtracting the
System suitability solution, r
System suitability solution:
SS
? r
W
. Calculate the percent response
efficiency for the
% response efficiency=100[(r
SS
? r
W
)(r
S
? r
W
)]
r
SS
=instrument response to the System suitability solution
Official from May 1, 2018
Copyright (c) 2018 The United States Pharmacopeial Convention. All rights reserved.

多片离合器的加工难度，他们自己是知道的，自己仿制了那么多，才挑选出来了合格的产品，当然了，现在看来，这些合格的产品也并不合格，寿命上大打折扣，仅仅这几天的高强度的试车，就将离合器片给弄废了。 “当然不能。”秦振华回答的很干脆，看着刘建志脸上的表情从兴奋，期待到失望，有种赏心悦目的感觉，我这可是顶撞了工厂领导，把所有副厂长都得罪了，才要来的名额，现在，便宜你？ 不少人都会俄语，但是英语，真的是难住他们了。 对于一款发动机来说，想要提升动力，就必须要从增压器上动手，现在己方的59坦克上，使用的是机械增压器，由发动机带动，这样会消耗动力，而发动机的排气系统，在排出废气之后，这些能量就浪费了，所以，现在为了提升动力，都开始从这个排气系统上做文章了。 “这怎么可能？”听到了秦振华的话，顿时，赵国栋和罗荣根两人几乎是同时开口了。 一边喝着小酒，吃着花生豆，一边扎金花，这日子，还不是美滋滋？ 王教授治学严谨，在学院很是有名，很多消息都在传，王教授已经是学院内定的副院长了，只等着老副院长退休呢，他承诺让秦振华来教书，那就一定能给办成的。