Loren Data's SAM Daily™

SAMDAILY.US - ISSUE OF JUNE 05, 2021 SAM #7126
SOLICITATION NOTICE

66 -- DEPOSITION PRINTER WITH GRAVIMETRIC CALIBRATION

Notice Date

6/3/2021 11:17:25 AM
 

Notice Type

Combined Synopsis/Solicitation
 

NAICS

334516 — Analytical Laboratory Instrument Manufacturing
 

Contracting Office

DEPT OF COMMERCE NIST GAITHERSBURG MD 20899 USA
 

ZIP Code

20899
 

Solicitation Number

1333ND21QNB680235
 

Response Due

6/7/2021 9:00:00 AM
 

Archive Date

06/22/2021
 

Point of Contact

Joni L. Laster, Patrick K Staines
 

E-Mail Address

joni.laster@nist.gov, patrick.staines@nist.gov
(joni.laster@nist.gov, patrick.staines@nist.gov)
 

Description

AMENDMENT I:� �The purpose of this amendment is to provide answers to questions received regarding Acceptance testing and Installation as follows: Question on Acceptance Test no.1: 1. Using a 1 M solution of nitric acid in water, average drop mass will be measured using the burst-mode gravimetric method (Anal. Chem. (2009) 81,8577) under a stable waveform and reservoir pressure. For each nozzle, this test will be repeated five times within 30 minutes using a script. The mass of the liquid deposited from each nozzle must be between 1 and 5 mL, with a relative standard deviation of less than one percent in the mass measurement of a particular deposition. The test will be repeated up to five times, modifying waveforms and reservoir pressures as appropriate, until the test is passed. As written, the test has a few logistical problems. 1. Total mass 1-5 g corresponding to 1-5 mL of water:� The weight limit for ultra-micro balances is 2.1 g, so the full requested range is not accessible.� This applies to all vendors of ultra-micro balances that we are aware of.� In addition, it is necessary for systematic control of evaporation effects to start each measurement with a filling of the weighing boat that fully covers the bottom surface.� Thus we estimate that at best the range 1-1.5 mL would be accessible. 2. Assuming the largest requested droplet size of 150 �m, which corresponds to 1.77 nL of water, requires 565,000 droplets to accumulate 1 mL of volume. Allocating 1 minute to measurement overhead (setup, evaporation measurement before and after dispensing the target volume) and 2 minutes dispensing droplets at 5 kHz would fit 5 measurements into 15 minutes net.� The problem is that after each measurement an operator intervention is necessary to empty out the weighing boat and reapply the base fill covering the bottom of the boat.� This is due to the capacity limit of the balance pointed out in problem 1. We note that in Anal. Chem. (2009) 81, 8577 a minimum volume of 72 �g or 1490 droplets of isobutanol were found to be sufficient for a 1% measurement, and similarly in Measurement (2017) 100, 72 a minimum volume of 470 �g (470 nL) or 3670 droplets of water (at 128 ng/droplet, or 63 �m diameter) were found to be sufficient for a measurement with k=2 extended uncertainty of 1%.� Accordingly, the objective of proving a 1% measurement capability can be achieved with microliter volumes rather than milliliter volumes.� Working in the microliter range, e.g., 10-50 �L, will then allow to run 5 or more tests in a script without interruption and operator interference comfortably inside of half an hour. Answer: The Government shall update the acceptance test to reflect the following change: FROM:� ""between 1 and 5 mL"" To:� ""between 1 and 5 microliters Question:� Installation will need local help to place the machine into the desired room and onto the desired table.� The machine size will require probably six to eight people to lift the machine off of the base of the crate and onto the table.� Can this be provided? Answer:� The Government shall provide the necessary help with installation All other terms and conditions remain unchanged.
 

Web Link

SAM.gov Permalink
(https://beta.sam.gov/opp/7871375cbca24182ad81a4920f1fbc73/view)
 

Place of Performance

Address: Gaithersburg, MD 20899, USA

Zip Code: 20899

Country: USA
 

Record

SN06021088-F 20210605/210603230119 (samdaily.us)
 

Source

SAM.gov Link to This Notice
(may not be valid after Archive Date)

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